Placed in a puddle, it starts digging in immediately. My book says they're a "voracious predator", so I guess I helped a voracious predator today.
Think it's another clam worm. There are also such things as lug worms and opal worms, etc., in this world.
Too dark again. I believe it's upside-down, with mouth on the right. The reddish portion writhed side-to-side madly, as seems to be typical when they're trying to swim (this one is in shallow water). It sort of works, though not very well, and always gives the impression of pain and injury. Interesting that this one, after righting itself, was not too concerned about digging into the sand... not that I waited around for long...
This is a couple of weeks old, but I haven't seen anything worth photographing since, so here you go, my imaginary nonexistent reader.
Whocaresbut: the casual guides in my little library have a couple different clam-worm-ish things. "clam worm" is good enough for my purposes.
This is something different, I'd have to think -- big and impressive with paddle legs -- but I'll put it here for now.
Here is something else similar to a clam worm -- I'll have to find out what the general umbrella term is. Extracted from a dead sea star.