Sea Slug or Nudibranch?

[petoonia]

I found this crawling around in my tank last night. Its about an inch long. Anybody know what type it is?

Sorry these are the best pics I could get! I posted this in the RD forum, but I thought I might have better luck in this forum.

 

[dc]

Well I can't help you, but there are a lot of very knowledgeable people that can. Hopefully its a good thing, kind of cool looking.

 

[MoCha920]

it looks like a hitch hiker slug... is it eating any of your corals ?

 

[LeslieH]

It would help to have a shot of the head end (which is hidden on the left). Still, it looks a lot like the sacoglossan sea slug Elysia flava which occurs in the Caribbean & off Florida. Is your live rock from either of these areas?

 

[Mr. Guitar]

It's a Nudibranch. It might be some sort of Lettuce Nudibranch.