vermatid for sure but also starfish. I woke up twice to finding a starfish right on it. Actually these starfish are a problem for me right now... The vermitid I bought bumble bee snails which are supposed to eat them but these starfish... Asterena or w/e they're called. Ate my rainbow yodas, my hallucinations, this contest and so many more I lost track... I got a harlequin shrimp and my copperband ate it same day lmao. I have no good luck ever... I managed to pull several dozen out when I popped the shrimp in the tank all the stars were on the glass and sand. I cleared a lot out. But on the plus side, my phosphates are on check