ID please?

[Justin1997]

can anyone tell me what this is and if it's good or bad?

 

[reef lover]

Nudibranch....bad

 

[Tahoe61]

Yes Nudibranch.

What new corals do you have? Typically Nudibranch look like what they eat. Zoanthid eaters are colorful, Sarcophyton eater look like the polyps of leather and the same for Xenia.......

 

[Salty1962]

Pull them out as you see them and start looking for eggs around your corals. When you see them, there typically are eggs somewhere.

 

[Justin1997]

dang it that's what's goin on with my zoas, any fish eat them?

 

[zoomonster]

Just some nudibranchs are bad... google zoanthid eating nudibranchs. Pretty sure that is one. Focus on the shape as they will morph colors depending on what they are eating.