Just pulled this off my hammer coral

[Doubleu1992]

Is this guy bad or good?

 

[TangerineSpeedo]

Good! Eats Algae’s, @WheatToast

 

[Doubleu1992]

Good! Eats Algae’s, @WheatToast

Thank you! do you happen to know what it’s called?

 

[Doubleu1992]

Good! Eats Algae’s, @WheatToast

is it just a baby snail?

 

[Dierks]

Looks like a baby lettuce sea slug

 

[WheatToast]

Thank you! do you happen to know what it’s called?

From one of my other posts:
Looks like a harmless Elysia (lettuce) slug, which is not a nudibranch but still a type of sea slug. These will suck the “sap” out of some green algae and steal their chloroplasts to photosynthesize. I once had one that ate Codium, but ReefCleaners says they will also feed on Ulva, Penicillus, and hair algae. Be careful to make sure your pumps and inlets are protected to prevent the slug from being sucked up.

Various species:

 

[Doubleu1992]

From one of my other posts:
Looks like a harmless Elysia (lettuce) slug, which is not a nudibranch but still a type of sea slug. These will suck the “sap” out of some green algae and steal their chloroplasts to photosynthesize. I once had one that ate Codium, but ReefCleaners says they will also feed on Ulva, Penicillus, and hair algae. Be careful to make sure your pumps and inlets are protected to prevent the slug from being sucked up.

Various species:

Thank you so much. Its back where I found it!