• Can you tell me what kind of mollusk it might be?

  • Maria

Please tell me, I introduced new live rocks into my aquarium, and after a while, some black slug-like creatures without shells started to emerge, about a centimeter long. What could this be? Is it dangerous for the invertebrates? How should I deal with it if necessary? Thank you in advance, Denis.

Darrell5975

Possible - sea cucumber. If anything, reserve one for me for exchange or sale. PS. Even a bad photo significantly simplifies the identification task.

Stephanie9175

But if there is still a small "helmet" instead of a shell, look for stomatellas.

Kyle

Sure, thank you! I'll try to take some photos and look into the stomatella. They seem to be purely black. I once suffered from a similar nuisance that affected my sarcophyton, so I'm worried to avoid repeating my unfortunate experience.

Amy9618

99.9% - stomatella