ID please

[Giovanni]

A friend picked up a few of these as a hitchhiker. I have an idea what it is but another friend disagrees. Looking for a positive ID on this please.

 

[cloak]

I don't have an ID for you unfortunately, but perhaps these links will help. GL.

http://www.advancedaquarist.com/2004/10/inverts

http://www.advancedaquarist.com/2004/12/inverts

 

[ginpang]

ID please

Looks like an Arminidae ( armina or dermatobranchus sp.) generally feed on soft corals, sea pens , gorgonians

 

[pagojoe]

Ginpang is right. It's an arminid nudibranch. They keep turning up on "Clove Polyps," which is one of their prey species.

 

[Giovanni]

Thanks

 

[Betta132]

Gotta say, I really like how the one in the second photo is contained by just the surface tension of the water. Pretty cool.

 

[donut0079]

It's too bad that we can't know that they would only eat clove polyps or there would definitely be a niche for these.