Saturday, November 07, 2015

White on blue

All that remains of a calcareous tubeworm colony on a plastic float, left high and dry on a wharf:

Spirals, curves, angles

These are the tubes made by three species of tubeworms, The tiny spirals, about 1/8 of an inch across, protected the dwarf calcareous tubeworms, Spirorbis spp. The curvy, fat tubes are probably by a relative, Serpula vermicularis, and the rough, oddly-shaped, thinner ones belonged to a different Serpulid. Alive, they would each house a worm with a brilliant, feathery top,

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