Is that a stomalla snail in the third and fourth picture? lol its a familiar site that I see in my 24G.
You mean the thing on the glass in the corner?
I have no idea what it is, 2 of them showed up on our live rock just recently.
It's like a snail with no shell, kind of reminded me of a sea cucumber or something too when you look at it up close.
I'll wait for someone to tell me it's bad for a reef tank.... since there is no way to find them (or remove them) without tearing the tank completely apart. :wall: