After all the creeping and scrambling beasties had been washed out and transferred to the aquarium, what remained were the little acorn barnacles, and, in the bottom of the shell, a colony of little brown jugs.
|They're shaped like those little brown glass whiskey bottles I find in antique stores.|
|One opening at the top, curved "wings". The small barnacles give an idea of their size; maybe up to 1 cm. tall.|
These look to me like solitary or social tunicates, but I can't find any that look like this. And tunicates are basically a living filter system, with two siphons, an intake and an outlet; most of these seem to have only one siphon. Where is the other one?
|Removed from the shell, they stand up on my foam base. In this photo, it looks like two of them have the outlet siphon, as well.|
|A single animal, on its jelly base.|
In the second photo, one has a snail crawling near the siphon. Here it is, greatly magnified.
|It looks like a trophon snail.|
I keep thinking of another species of tunicate, and going off hopefully to investigate. Everything is similar; nothing matches. Help!