White crowns and purple feather-dusters

 About those purply worms ...

It was a bright, clear day, with barely a ripple on the water; just the kind of day to be poking around under docks.

Brown's Bay. The docks float on these blue tubs, a comfortable home for a variety of critters.

I like this muddled view. Dock planks, reflections of overhead structures, algaes and anemones underwater, overlaid by those reflections.

Most of the tubs carry the giant plumose anemones and a scattering of green sea urchins.

Urchins, anemones, and a wide-open scallop mouth.

The Giant Plumose anemone, Metridium farcimen, is white or brown, sometimes with a brown column and white tentacles. It can be distinguished from the Short Plumose by the lobed tentacular crown, as seen here, as well as by its size; it grows up to 1 m. tall, whereas the Shorts barely reach 10 cm. It likes low current sites, such as in this protected bay.

The scallop, probably the Giant Rock scallop, Crassadoma gigantea, (Update: Swimming scallop, Chlamys rubida) has an orange mantle, and if you look closely, a row of tiny eyes along the rim.

The abundant eyes of a giant rock scallop (Crassadoma gigantea) are backed with tiny mirrors that reflect light, unlike our eyes that use lenses to bend and focus light. The mirror in each eye has multiple layers to gather different wavelengths of light, and reflect that light onto a double-layered retina. (Jim Auzin's Photography)

Looking at me, looking at it.

And now, the worms.

Vancouver feather-duster worms, Eudistylia vancouveri, growing on a chain.

These are large tube worms, growing to 10 cm. long. In normal lighting, they look almost black, but bright sunlight brings out the purple and blue colouring.

Feathery red algaes to go along with the feather-duster worms.

A giant acorn barnacle, feeding.

In deeper water. A brown anemone with its white crown.

These long ribbed kelps attach to the tubs and float out into the sunlight.

On the way back to dry land, I leaned over the railing of the walk to look at the seaweeds growing on the sea floor. Tiny fish circled and swooped over them, echoing the flight of the swallows overhead.

Red and green algaes, eelgrass, and fish.

Next: clambering over rocks.

~~~~~~~~~~~~~

Acerca de esos gusanos plumero ...

Un dia de sol, con mucha luz y el agua casi sin olas; un dia ideal para andar rebuscando debajo de los muelles.

Foto #1: Brown's Bay. Los muelles se sostienen encima de estos botes flotantes azules, donde se encuentran comunidades de criaturas marinas.

#2: Me gustó esta foto toda revuelta, con las tablas del muelle, los reflejos de las estructuras arriba, y varios niveles de criaturas debajo, algunas vistas por medio de los reflejos.

#3: En la mayoría de los flotadores crecen las anémonas gigantes plumosas, y varios erizos de mar verdes. Aquí además hay una vieira de rocas con la boca abierta.

La anémona gigante plumosa, Metridum farcimen, es blanca o color café, a veces con la columna café y la corona blanca. Se diferencia de la anémona corta en que los tentáculos de la corona forman lóbulos, y además por el tamaño, ya que pueden crecer hasta 1 metro de largo, mientras que las otras llegan apenas a 10 centímetros. Les gustan los sitios con baja corriente, tales como esta bahía quieta.

La vieira, Chlamys rubida, tiene el manto anaranjado, y si te fijas bien, verás una hilera de ojitos en los labios.

Los ojos abundantes de una vieira de rocas (Crassadoma gigantea) tienen al fondo espejitos que reflejan la luz, en contraste con nuestros ojos que usan lentes para flexionar y enfocar la luz. El espejo en cada ojo tiene varias capas para captar la luz de distintas longitudes de onda, y reflejan esa luz hacia una retina de dos capas. (Jim Auzin's Photography)

#4: La vieira, mirándome.

#5: Y ahora, los gusanos. Son los gusanos plumero de Vancouver, Eudistylia vancouveri, y están creciendo fijados en una cadena en el agua. Estos gusanos, normalmente se ven casi negros, pero cuando la luz del sol les llega, se ven sus colores vívidos, morado o azules.

#6: En la misma cadena, unas algas rojas con filamentos finos.

#7: Un bálano gigante, buscando su comida.

#8: A la base de un pilote, las anémonas son más grandes. Aquí se ve una con la columna color café y la corona blanca.

#9: Estos quelpos se adhieren a los flotadores, y extienden sus largas hojas hacia el sol.

#10: Camino a tierra firma de nuevo, me detuve para mirar las algas al fondo del agua; algas rojas y verdes, y las hierbas Zostera. En el agua por encima, estos pececitos daban vueltas, como si copiaban los vuelos de las golondrinas en el aire arriba.

Mañana: algunas rocas.

All dressed in red.

 A calm day, with quiet seas; small waves, whispering as they reached the sand, bringing with them sprigs of rockweed and sargassum, and the occasional baby bull kelp. And this one, all dressed in red.

Young kelp. The next wave will move it a few centimetres higher up the beach.

This was a small kelp, as these kelps grow, and it had lost its long blades. But it was growing a good batch of red nori, as a substitute. Accompanying it on its way onshore are a couple of eelgrass plants, besides the rockweed and sargassum.

Detail, showing the red algae attached to the stipe.

This is probably Bull-kelp Nori, Porphyra nereocystis, which grows only on the stipes of bull kelp. It is edible, dried and roasted, and can be found winter and spring. One of these days, I'll harvest some and try it.

As much of it as could be seen. I don't know if there was a holdfast.

From there I went to investigate anemones on the rocks. Photos tomorrow.

~~~~~~~~~~~~~~

Era un dia tranquilo; en la playa las olas llegaban suavemente, murmurando, trayendo consigo ramitas de Fucus y de sargazo, y a veces un quelpo muy pequeñito. Este era un poco más grande, y venía todo vestido de rojo.

Fotos: Un quelpo Nereocystis luetkeana con sus algas rojas, el nori Porphyra nereocystis. Acompañado con ramitas de Fucus y de sargazo.

Creo que este es el alga roja que crece casi siempre en los tallos del quelpo gigante. Es comestible, ya seca y tostada; alguna vez voy a cosechar una cantidad para probarla.

De allí fui a las rocas para buscar anémonas. Mañana subiré fotos.

Not-so-perfect housekeeping

 I do clean my aquarium. I really do. I scrub the walls every week with a toothbrush and a green dish scrubber (not metal, because it scratches the glass). I change the water and clean out old algae and vacuum up leftover foodstuffs. And scrub those walls.

But there's always a corner I miss, hidden behind an anemone I don't want to pester, or buried in sand that a crab just piled up in her everlasting building project. And whatever I want to look at always seems to hide right behind the messy corner.

I was watching a big, fat, shiny worm gobbling shrimp pellets, waiting for him to come within camera range (and he never did), and stopped to take a photo of a limpet eating, instead.

In the algae-infested corner, of course.

So frustrating!

I usually delete these photos if I can't clean them up, but I kept this one, as is. The limpet is eating the algae; that's why she's in that corner.

There are at least three species of algae growing here. First, those brownish spots. These grow really fast; within a week they'll cover all the walls of the tank. Several species of algae grow as crusts or microscopic dots; these are among them.

Then there's the brighter green algae; these look like the beginnings of sea lettuce.

And the small red spots: several red algae species grow in two stages. Turkish washcloth, Mastocarpus sp. for example, is a crust in one generation, and the next generation grows as a large, lumpy, towel-like blade. These slow-growing red spots may be Turkish washcloth. They have also colonized the water pump, and are very hard to scrape off.

The limpet isn't the only one eating algae; white spots are probably copepods; there's a larger one inside the shell of the limpet, wagging its tail. Good eating here, it says!

~~~~~~~~~~~~~~~~

Cada semana limpio el acuario. De veras, sí que lo limpio. Friego las paredes con un cepillo de dientes y un estropajo verde (no de metal, pues estos dejan marcas en el vidrio). Cambio el agua y saco algas viejas y aspiro restos de comida. Y pulo esas paredes.

Sin embargo, siempre se me escapa una esquinita, tal vez fuera de mi alcance tras una anémona que no quiero molestar, o cubierta de arena apilada por una cangrejita en su perenne afán de construirse escondites. Y luego, cualquier cosa que quiero mirar parece estar protegida atrás de esa esquina olvidada.

Estaba observando un gusano gordo y brilloso que se tragaba unas bolitas de camarón, esperando a que se acercara para que le sacara una foto, lo que nunca hizo, y lo dejé para tomar una foto de una lapa, que sí se presentaba a la vista. Pero, por cierto, en esa esquina llena de algas.

Casi siempre borro estas fotos, si es que no se pueden limpiar. Pero me quedé con esta, tal como está. La lapa está comiendo el alga; por eso se metió allí.

Hay por lo menos tres especies de alga que crecen aquí. En primer lugar, todas esas manchas cafés. Estas crecen rapidamente; dentro de una semana, cubrirán todas las paredes del tanque. Hay varias especies de alga que crecen como puntitos microscópicos, entre ellas, esas manchas.

Y luego hay unas hojitas de alga de un verde más vivo; parecen ser plantitas de lechuga marina, Ulva sp.

Y los puntitos rojos: varias especies de alga roja hacen el ciclo de vida en dos etapas. La toallita turka, Mastocarpus sp., por ejemplo, es una costra en la primera generación, y en la siguiente crece como una hoja grande con protuberancias, algo así como una toalla. Estas manchitas rojas en el tanque bien pueden ser la toallita turka. También se han metido a la bomba de agua, y son muy difíciles de quitar.

La lapa no es la única que está comiendo algas; los puntitos blancos probablemente serán copépodos. Hay uno más grande dentro de la concha de la lapa, meneando la cola. ¡Buen provecho!

Too much to see

 It has been said that, "coastal BC has a greater species diversity than anywhere else in North America". (Raincoast Conservation Foundation, in BC’s coastal biodiversity: the highest in North America, an article that completely bypasses marine invertebrates, but does pay attention to seaweeds; "In British Columbia, more than 500 species of macroalgae have been recognized, making up about 4.5 % of the world’s total marine algal species.")

Nowhere is this biodiversity more apparent than on the intertidal plain. With every cautious step at low tide, I crunch the shells of tiny animals, slip on seaweeds pink, red, green, brown and yellow, send critters scuttling and splashing for shelter, or squirting small fountains at my legs as clams and worms retreat deep under the sand. A tidepool is a multi-coloured, multi-textured collage, too varied to be sorted out on the fly.

I am reduced to taking photos at random, hoping something will come into focus on my computer screen.

Tidepool about 2 inches deep; my shadow at the bottom right.

At first glance, examining this photo, I see 9 separate species of seaweed:

• green sea lettuce
• red bladed algae; smooth, wide, translucent blades.
• pink crustose coralline algae, coating stones
• a green hairy seaweed
• a red seaweed, with stiff central blades, from which sprout thinner red "leaves"
• rockweed
• old eelgrass, with
• encrusting fuzzy algae along the blades (or these may be hydroids, an animal)
• yellowish algae coating an old clamshell and a snail (or hermit crab) shell.

But that's not all: under every stone, under every shred of seaweed, crabs and hermits, worms and small fish and assorted isopods and hunting whelks hide from the sunlight, and from my moving shadow. And, of course, hundreds of eggs. Among those not doing so good at hiding, I can see:

• a burrowing anemone, Anthopleura artemisia,
• snail shells which may house the original shell, or just as likely, a small hermit crab
• several limpets
• and a couple of legs of a kelp crab who thinks he's out of sight.

What looks like a single-culture mass of seaweed turns out to be another collage:

Bad (green) hair day.

In this photo the algae are the green hair, green sea lettuce, and that red-bladed alga. In the background; rockweed and a fuzzy brown seaweed. Snails and barnacles dot the rocks.

And I know I'm missing half of what's there!

~~~~~~~~~~~~~~~~~~~~~~~~~~~

Se ha dicho que —las costas de Colombia Británica contienen una mayor diversidad de especies que la que se presenta en todo lo demás del continente — (del sitio Raincoast Conservation Foundation, en un artículo que olvida por completo el reino de los inveterbrados marinos, pero si nota de las algas marinas, que —en las costas de Colombia Británica se han reconocido más de 500 especies de macroalgas, constituyendo aproximadamente un 4.5 porciento de las especies de algas marinas mundiales.) 

En ninguna parte se nota más esta diversidad de especies que en la zona intramareal. Con cada paso que doy, tan cuidadosamente, aplasto una variedad de animalitos, me resbalo sobre algas marinas rojas, verdes, amarillas, color de rosa o de café, espanto varios animales que se apuran a esconderse bajo las piedras o que, retirándose dentro de la arena, hacen pequeños fuentes que bañan mis piernas. Una poza intramareal hace un "collage" de una multitud de texturas y de colores, tan variado que no se puede capturar a simple vista.

Me veo forzada a sacar fotos al azar, esperando que al verlas en la pantalla, se puedan entender.

La primera foto es de una poza intramareal, más o menos de 4 o 5 cm. de profundidad. 

A primera vista, veo hasta 9 especies de algas marinas:

• lechuga marina, Ulva spp.
• una alga roja de hojas anchas, lisas, translúcidas
• una alga coralina incrustante, color de rosa
• una alga verde en forma de pelos
• una alga roja con tallos tiesos, de los que brotan hojas delgadas
• sargaso vejigoso, Fucus spp.
• hierba marina Zostera madura, cubierta de
• una alga encrustante a lo largo de las hojas (o puede ser un hidroide, o sea un animal)
• una alga amarillenta creciendo en una concha abandonada de una almeja y en un caracol.

¡Pero eso no es todo! Bajo cada piedrita, bajo cada hoja de alga, se esconden cangrejos y ermitaños, gusanos y pescaditos, isópodos variados y bocinas cazadores, fuera de la luz fuerte del sol, y también huyendo de mi sombra. Entre los que no se escondieron perfectamente veo:

• una anémona, Anthopleura artemisia
• conchas de caracol marino, que pueden contener los caracoles mismos, o si no, cangrejos ermitaños
• varias lapas
• y un par de patas de un cangrejo "kelp" que cree estar bien escondido.

Segunda foto: lo que aparece una masa de una sola alga resulta ser otro collage. Las algas aquí son un pelo verde, lechuga marina verde, y la alga roja de hojas anchas. En el fondo se ven sargaso vejigoso y un alga café. Caracoles y bálanos toman el sol en las piedras.

Y por seguro, mucho se me pasa sin observar.

Reds and browns

Miracle Beach is a busy summer beach. It's a wide, sandy, clean beach at low tide, in season sprinkled with happy kids, sand sculptors, and sleepy sunbathers. I went down in mid-winter, at high tide. There was no sand. All along the shore, up against the wet logs (it had been raining), were mounds of shredded algae.

On other beaches, winter high tides bring in tangles of long bull kelp and knots of eelgrass, ripped up by the roots, maybe some rockweed, and an occasional blade of Turkish towel. Here on the Miracle Beach shore, most of the algae were brown and red. A variety of kelps, but not one piece of bull kelp along the whole length of the beach. Many red algae; blades and threads and delicate feathery branches. Everywhere there was Turkish towel, new and old, from deep wine red (fresh) to magenta, to pink, then, sun-bleached, to pure white.

At the north end of the beach, more sea lettuce intermingled with the reds and browns. The gull is carrying a piece of dark brown seaweed.

Sugarwrack kelp, Saccharina latissima, with shreds of many others.

Besides the sugarwrack here, there is brown: a smooth-bladed kelp, a blade of eyelet silk, a stipe of something or other. Red: a handful of red spaghetti, a small branch of sea lace, a blade of something pink, and a fragment of Turkish towel. Green: the sea lettuce, and eelgrass.

A fragment of a winged kelp. With a few leaves of California rose, or something similar, sea lettuce, eelgrass, Turkish towel, and a smooth red blade, maybe iridescent seaweed.

Red eyelet silk, Sparlingia pertusa, bleached to brownish yellow. And a snail.

A very bleached blade of Turkish towel, showing the knobby papillae.

I brought home a small blade of Turkish towel, a clump of a small rockweed, and a handful of red spaghetti, Gracilaria sp., all of which I added to the aquarium. The kelp crab loved the red spaghetti:

It's good camouflage, almost matching his long legs.

No hiding place for a little hermit.

 ~~~~~~~~~~~~~~~~~~~~~~~

La playa "Milagro", Miracle Beach, es una playa excelente para pasear un rato en el verano. Amplia, arenosa, limpia; siempre que la marea está baj, la playa está llena de niños jugando, escultores de figuras de arena, y gente soñolenta, tomando el sol. Pero yo fui a medio invierno, con la marea alta. No había arena. A todo lo largo de la playa, pilas y montones de algas marinas, rotas en pedacitos, cubrían el espacio entre el agua y los troncos caídos.

En otras playas, las altas mareas depositan nudos de hierba marina Zostera, y del kelp gigante, el de los tallos de muchos metros de largo, tal vez un poco del alga Fucus, y de vez en cuando un pedazo de toalla Turka. Aquí en la costa de Miracle Beach, casi todas las algas eran algas cafés o rojas. Había una gran variedad de alga "kelp", pero en toda la playa no vi ni un tallo del kelp gigante. De las algas rojas, había muchas diferentes, especialmente la toalla Turka por dondequiera, en todos sus colores, desde el rojo oscuro de la planta nueva, a magenta, color de rosa, y blanqueado hasta un blanco puro.

Las fotos; una gaviota con un pedazo de alga. Al extremo norte de la playa.

Una hoja de kelp "azucarada", con una variedad de pedacitos de otras algas.

Un trozo de kelp "alada".

Una lámina de lo que llaman ojete rojo. Es rojo cuando es nuevo, pero se vuelve amarillo con el tiempo. Siempre tiene esos agujeros.

Un pedazo blanqueado de toalla Turka, mostrando sus papilas.

Me traje a casa para el acuario, una rama de kelp azucarada, una plantita de Fucus, y un manojo de espagueti rojo. Al cangrejo kelp, le encantó este último: le sirve muy bien de camuflaje. Al ermitaño, no, pero como le gusta treparse a todo ... 

Blobby bryozoans

Early winter storms tear and uproot the summer's crop of seaweeds. The mound along the high tide line, that in summer is mainly eelgrass with a sprinkling of sea lettuce and rockweed, in November becomes a full salad bar, multi-coloured, multi-textured.

In a short walk, I collected a bag of treats for my hermit crabs, with only one sample of each species, I ended up with a full grocery bag. Sea lettuce, of course. Two kinds of rockweed. Turkish washcloth, and a black, leathery, pimpled towel seaweed, four or five kinds of kelp, the invasive sargassum, several tiny blackish curly weeds, Pacific rose algae, red blades, rubbery threads, ... I didn't bother with eelgrass; the aquarium is planted with a fair crop from my last collecting trip.

I collected three pieces of a red algae that was coated with bryozoans. None of the algae were entire; they were stalked, and opened out into red blades, badly torn, rotting along the edges; I couldn't determine their shape or full size. But the bryozoans intrigued me.

At home, in a bowl. The stalks are encrusted with these hard blobs. The pink stub at the right seems to be a growing tip of the algae; there were several of these.

One of the blobs. Each little hole was the home of one zooid. If you look really closely (click for full size) you can see tiny pink pores on the body of each case.

Where the stalks met the blades, the structure changed; here they lie flat, one critter deep. Membranipora sp., maybe?

I don't think any were alive; they'd been lying out on the shore for a while. I looked while they were underwater, but saw no hint of movement.

I've been searching for an ID in my books and on the web, but can't find any that take these two forms on red algae. Blobs on rocks, yes. Single layers encrusting kelp, yes. Both together, no.

Membranipora membranacea is common on bull kelp on our shores; it makes circular, flat colonies on the blades. I could find no photos or record of it making these blobs.

And the crabs, hermit and "true" are happy, busy climbing and feasting.

Toothy skirts and a hat for spring

The advantage of glass walls is that sometimes you get to see a limpet on the move.

Lifting her skirts to run.

It seems odd that the limpet manages to negotiate curves and 90 degree angles, with a shell that we usually see clamped tight to a flattish surface. But they are capable of lifting the shell enough to get a grip on the new wall and from there, its a simple matter to slide on up, carrying the shell like an umbrella.

This one's decorated nicely with stripes of green algae and fanning barnacles. Some of her relatives wear hats:

Limpet (3/8 inch across) with her flamboyant spring bonnet.

(The long tube in the top photo is limpet poop.)

Miniature water garden

No matter how often I scrub the inside walls of my aquarium, it usually has a haze of green and red algae growing back. And a school of copepods browsing among the plants.

I usually scrub it all off, just before I take photos. This time, I left things as they were.

Yellow-green and red algae start off with circular spots, becoming splotches. Green-green algae start off as blobs, become bigger blobs. Sand grains (regular fine beach sand) show the comparative sizes.

The copepods have one eye each. The ones carrying a round trailer are females; look closely at the one on the left: you can see the egg cases.

In the sand below, miniature polychaete worms scoot up and down their tunnels, waving twin tentacles to capture today's lunch, bits of detritus, scraps of the algae.

Here, the tentacles extend up into the water column. Food particles travel down a groove to the hungry mouth below.

My flash disturbed the worm and he shrunk back into his tunnel. But he soon forgot about it, and pushed back up to the surface to keep on fishing.

Today, I also saw a two-inch long green ribbon worm, out looking for prey. He's an active predator who likes barnacles. He hid in the sand before I collected the camera.

In the pink

I see them often on the beach at low tide: small, white, randomly branched, calcareous tubes. When I pick them up, cautiously, they start to break up. Put in a container to bring home, they make the trip in pieces.

I took a photo of this one as found, without touching it.

Coralline red algae. A seaweed, recently deceased.

These small algae are red or purplish pink, but turn white when they die. This one is still fresh, with only the tips of the branches showing white.

The algae deposit calcium carbonate in their cell walls, which helps to protect them from browsing by snails and other animals. To be flexible in the surging tides and waves, each little node is separated by non-calcareous "knees"; when the alga dies, these knees quickly deteriorate, and the nodes begin to scatter themselves across the beach.

Alive, the algae stay attached to the sea floor by holdfasts. Wikipedia has a photo of one, still alive, still attached to its rock.

Photo by David R. Ingham, California.

In this specimen, the nodes are shorter and fatter; it is probably a different species,even a different genus, but identification is almost impossible except during the reproductive stage, and then only with a microscope. (Kozloff, p. 158)

I picked up my find, gently. It survived. Because it was still pink.

Another red alga

This one washed up on the shore of Tyee Spit at high tide.

Single blade with ruffled edges. I'm holding it by a short stipe.

Red silk

I'm back. With the holey seaweed I mentioned.

A thin red algae found floating in the sea foam. Red eyelet silk, Sparlingia pertusa,I think.

The blade was about a foot long, tapering to a short stipe attached to a small holdfast.

A miniscule snail (4 - 5 mm. long) somehow stayed attached in spite of my struggles to hold the seaweed flat in a howling wind.

This is one of the largest red algae in our area. It grows on rocky shores at the lower intertidal level and below, from Alaska to Oregon. This one was on the outer side of Oyster Bay.

You are what you eat

Northern winters are tough on the little beasties that live at the intersection of sea and shore. Temperatures change, often drastically, in the course of a few hours. Storms toss whole colonies up on the beach, bury them in mounds of slimy, rotten eelgrass, drop logs on top of them. Cozy shelters in the seaweed are stripped bare; on the scoured stones, there is nothing left to eat, nothing to hide a scuttling crab from the myriads of hungry birds following the tide line.

My tank critters are spoiled. The temperature stays put; so does the water. Food drops from on high every day. There are no birds, and the cat doesn't relish getting wet.

Grainy-hand hermit on the remains of a kelp holdfast.

But even here, winter brings its losses. I comb the beaches year-round, searching for salad fixin's and gym equipment for the hermit crabs. In summer, there are bright sheets of sea lettuce, tall stalks of eelgrass, some loaded with delicious hydroids and diatom fuzz, knobbly Turkish towels and washcloths, long, green hair, stubby rockweeds, and more. But in winter? Bare stones, washed-out shreds of unidentifiable weeds, stripped of anything edible. And tea-leaf black, dried eelgrass.

In earlier years, the tank in winter gradually lost all its greenery, until the hermits wandered about disconsolately on bare sand and stone. I supplemented their diet with human food, sheets of green algae meant for sushi wrappings. They liked that, but it fouled the water.

The last couple of winters have been different. A red sheet algae established itself in the tank, and now grows as enthusiastically as the land plague, Himalayan blackberry. I have to keep cutting it back with every weekly water change. But at least there's something fresh to eat, and somewhere to climb.

Red algae is even trying to grow on the hermit's shell.

The change in diet has influenced the colours of some of the tank's residents. Red are redder, greens are browner. The colour of the shrimp's innards changes day to day, depending on his last meal; red today, transparent tomorrow.

And even the normally transparent copepods are striped with red and yellow. Look closely at the hermit above; there are a dozen copepods visible on his shell.

Three females with eggs, one male; the rest, I can't tell.

Most copepods have one red eye, a streamlined body, and a forked tail. The females carry their eggs around behind them; usually one pouch (Order Calanoida), sometimes two (Cyclopoida), one to each side. In the dark one at the lower left, the pattern is easy to see; red eye above, green bag beneath. The small, pale copepod at upper left may be a male of the Cyclopoida; his long, forked tail is just visible.

Drawing adapted from one by Jesse Cladgett.

Gaudy noodles

I've been collecting water and goodies for my aquarium all summer from a peaceful beach; a barricade of logs, a bit of gravel, a stony strip, and acres of sand in a protected bay. The water is clear, the wading easy. And the top of the rising tide brings in fresh sea lettuce and eelgrass, salad and exercise equipment for my critters combined.

Now, as the sunlight fades and the storms increase, the offerings cast up on shore have changed. Turkish towel and kelp lose their grip and are swept inland, along with rockweed bladders and sheets of red algae. I'm finding oyster shells, picked clean, and crushed crab carapaces; in the summer, these would have washed ashore whole.

A couple of days ago, the waves brought in a generous helping of red noodles.

Red noodle salad on a carved bark plate.

Succulent seaweed, Sarcodiotheca gaudichaudii. (Love that name!) As found.

Also in this photo: eelgrass strips, sea lettuce, rockweed, red algae sheets, Turkish towel, a curly-edged purplish kelp, and a branched, brown seaweed.

I brought home a handful, cleaned it, and floated it in a white tray for a better look.

Still looks good enough to eat.

Detail of knobby section of plant. Reproductive structures, maybe?

They say it's edible, but my hermits looked it over briefly and turned up their collective noses at it. So I didn't try it, either.

Busy, busy!

More test shots; back to the aquarium and live critters again.

This first photo is as taken; despeckled, resized, and sharpened only. I left the "dust" in place; it's part of the action.

In the upper levels of the tank, like it would be on the intertidal flats, everything is in constant motion. Here, the red algae sways in the water, and a small family of blue anemones glued to a fragile blade waves its tentacles, hoping to catch some of the swimmers that muddy up the current. Behind, bubbles dance; large ones going down, from the pump; small ones heading back up to the surface, carrying goodies collected en route. Released at the top, the goodies float back down; more specks in the water.

This red algae gathers "dust". I pour clean water over it, or take it out and swish it around in fresh water, and it looks beautifully clean. A few minutes back in the tank, and it's covered in these little specks. Some may be sand, some is detritus, leftovers from critter meals or floating fragments of rotting eelgrass, and the rest is made up of small animals, copepods and amphipods eating detritus, and tiny worms eating copepods and amphipods.

And I hadn't even noticed the hermit until I looked at the photo. There's usually one or two hidden somewhere in this mess.

Everything going at once

On the other end of the tank, and up close to the wall, things are more peaceful.

Leafy hornmouth snail, Ceratostoma foliatum, sleeping.

The water is clearer away from the current; I removed only a handful of swimmers and a scratch on the glass. This snail eats barnacles; in between times, he wanders around the walls, then goes to sleep for a day or so.

His shell started out white and pink, but as he grows it gets craggier and darker. He's beginning to show the "leaves" that give him his name; for now, they're just sharp lengthwise ridges.

Setup for these photos: black poster board behind tank, white reflector above and on both sides, spotlight aimed at top reflector, flash ditto. This seems to work on the upper levels, but not down on the sand. More experimentation needed.

Pink hair

Occasionally, wading in the eelgrass beds, I see what looks like a swirl of delicate pink lace floating by; finery that, bought in a store, would have a label saying, "Handwash only, with care."

They're remarkably resilient; I caught a double handful, tossed it in my bag, threw a couple of heavy clamshells and a tangle of eelgrass on top, and hauled it from pillar to post around the beach. It made the trip home intact, with not a shred torn off.

Filamentous red algae, with mussels, snail, and at least one skeleton shrimp. Can you find it?

Collected fresh like this, before they've been tossed up on the beach and sun-dried, they're home to hundreds of small critters. Skeleton shrimp are usually the first I see, mostly because they keep dancing. Then there are tiny black dots that under the microscope turn out to be baby snails and mussels. And each thread of the lace is surrounded with fine hairs, and a swarm of zippy copepods, and in season, jiggling crab or hermit zoea, trying to dodge the skeleton shrimp.

And then there's the seaweed itself:

Dotted-line branches. With passengers.

Zooming in.

My Encyclopedia tells me that there are maybe 60 or more species of these filamentous red algae along our coast, usually under 6 inches long.

Most are difficult to identify without the aid of a microscope.

Filamentous algae are made up of rows of single cells, in some species forming long threads, in others, branching. Each cell has a double wall; the outer ring contains the pigment that gives it the red colouring, phycoerithrin, masking the clorophyll that converts sunlight to sugars.

These are large cells; think of those snails crawling up and down the threads; multi-celled critters, with a complex anatomy, each total smaller than one cell of the algae.