What is this on my rock??

[Azul17]

Anyone knows what this is??? It was on the rock this morning. Looks like a snail but with no shell. It was black and it had little antennas. About 5 min after taking the pic he went back in to a whole on the rock.

Anyone knows what this is and is it good or bad?

 

[Flaxon-Waxon]

Google Stomatella Snail... Hard to tell from the pic. They're harmless if so.

 

[Azul17]

Yea, looks like stomatella also like a black scutus. I thing looks more like stomatella. So I shouldn't be worried? It won't. Hurt my zoas or mushrooms?

 

[Flaxon-Waxon]

As long as its a stomatella then you're fine...

 

[Azul17]

Ok. Thanx!!