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Nice article. That one is normally about an inch long, but some other Elysia species (which are also photosynthetic, by the way) may reach five or...
As I think about it, some of the Strombus people have split Strombus (Laevistrombus) canarium into several species, subspecies, or forms, and one of...
Neat pics! It's actually a "Dog Conch," also known as a "Yellow Conch." I don't think they are imported for the hobby very often, as yours is the...
It is a polychaete, but it's not a bristleworm. The eunicids are biters, but lack the defensive bristles of the bristleworms or "fireworms."
Like the others suggested, that's no beneficial bristleworm. You'll want to remove it if you can catch or trap it. The eunicids can be real pests...
Yup, it's definitely not a brittle star. It's going to be one of the filter-feeding (as opposed to sand-sifting) cucumbers. Cheers, Don
The orange thing is a snail, and could belong to a couple of different families. However, considering that most of these Turbos come from western...
That's fairly typical behavior for many of the nerite species. A few tend to stay below or right at the low tide line, but most spend time above it....
These animals are some of the same species sold in the hobby as "sand-sifting cucumbers," and aren't very closely related to the most toxic ones....
It probably is a snail, but I doubt it's missing its shell. Those little fuzzy things are probably papillae on the mantle, which covers the shell in...
They will eat snails, but maybe not all snails. The ones I had seemed to specialize on killing and eating the small conchs, and only occasionally...
Great video! It's an olive snail, Oliva reticulata, I think: Oliva (Viduoliva) reticulata I had no idea they were such effective killers until I...
When I hear "green tube," I usually figure it's the calcareous algae, Neomeris annulata. I think that's what you have, too. You can google for some...
They are great cleaners, but can't right themselves if they flip over or fall on SAND. They are reef-associated grazers, and do fine if they are...
Yeah, John beat me to telling you that about the Flamingo Tongue, Cyphoma gibbosum, since I'm on dialup at my parents' this weekend, and it took me...
It's probably a hydroid jellyfish. Look like this? hydroid jellyfish - Google Search Don
Kev has it ID'ed correctly as Ceratosoma sinuatum. It looks superficially like a "Lettuce Sea Slug," but it's not very closely related. The lettuce...
Yup, I couldn't tell what that cockscomb looking thing was on the right side, but after looking again at the cropped pic, I'm pretty sure that's...
Not. It's a true nudibranch, and feeds only on sponges, probably only on one or a couple of species of dysideid sponges. "Lettuce Sea Slugs" don't...
It does almost look like a detached starfish leg, especially with what appears to be tube feet protruding from the upper left side. Does it crawl,...
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