squishifishi
Hopelesly Addicted Member
Any clue what this is? It was on my live rock. There are at least 6 in there on the rock. The biggest is 3 millimetres big.
If they are Pseudocorynactis, they are notorious eaters of fish and of anything else that comes near them. One LFS near me used to have one that even ate mushrooms and hermit crabs. The only way they could keep it was in a species tank.