Id??

[scott84]

Found this guy on some sick coral a friend gave to me. Any ideas? He looks nudibranch like except he's dorsal-ventrally flattened.

 

[capncapo]

Looks like an aeolid nudibranch to me. I'd get rid of it.

 

[billsreef]

I think capncapo is right. It's not a type of nudi you want in a tank, especially since you found it on a coral that's not doing well. You should take out the coral and give it a very good inspection for other nudi's and more importantly, egg masses.