Slug living in my tank?

[avery155]

So every few days I see this guy wondering around. I also have something similar living in my sump. He seems to be growing. What is he though!?
Pics (from my new DSLR :D)

Thanks!

 

[dcantucson]

That's a Nudibranch.
Most are good, but some will eat on corals. I'd watch him closely but you are probably lucky with getting a cute little hitch hiker.

 

[RyanG]

Nudi Pixel: Nudibranch and Sea Slug Identification with Photographs Have fun ;)

 

[Solarfall]

Most nudibranchs starve relatively quickly in aquariums since their diets are so particuliar.

 

[Smitty]

Yep...they all have you covered with the id

 

[Sharkie]

even if he is bad, hes adorable!! :3

 

[avery155]

Awesome, I know he has been living in there for at least a month and he seems bigger. So for now he must be getting food somewhere (hopefully). Thanks!

 

[mikewurtz]

That thing is adorable. I have a pretty large sea hare . . . and he's fug ugly.