please help me ID this

[copenhagen_cowboy@live.co]

Please help me ID this I just found a nudibranch in my tank. about 1 1/2" long brown with a white underside and a bright orange line all the way around it and its mouth

[Goomba]

Looks like a detritus eating nudibranch, but cant guarantee it. If it doesn't have frilly appendages it usually eats something other than coral, like sponges. Slugs are tough to trust if you don't know what it is though

[iamfrontosa]

Don't know. I don't trust anything that I can't ID.