ID help!!

[BMahura]

Stating to think that it's a cucumber. However I can seem to find what kind it is. Does anybody have a good invert identification data base that they use?

[Enigma]

Sea cucumber gets my vote, too.

I think the only real risk is if it dies, or barfs up its internal organ. It could poison your whole tank. I would remove it for that reason alone, but my risk acceptance is pretty low.