Friend or foe?

[JayM]

Looks like a slug, but I haven’t a clue what it is, or if I should leave it or squash it. Any ideas?

 

[Reefkeepers Archive]

Might be a stomatella, @ISpeakForTheSeas?

 

[ISpeakForTheSeas]

Looks like a nudibranch to me, but I would need pics of its top-side (it’s back) to ID.

 

[JayM]

Best I could do. There’s only one, but it’s a weird reflection due to camera angle.

 

[ISpeakForTheSeas]

I can’t quite make out what the back looks like well enough, but I’d guess an Arminid (taxonomic family Arminidae) species of some variety, possibly a Dermatobranchus sp.

Do you have any octocorals in the tank? (Soft corals, gorgonians, gsp, etc.?) I ask because Arminids feed on octocorals.

 

[JayM]

I can’t quite make out what the back looks like well enough, but I’d guess an Arminid (taxonomic family Arminidae) species of some variety, possibly a Dermatobranchus sp.

Do you have any octocorals in the tank? (Soft corals, gorgonians, gsp, etc.?) I ask because Arminids feed on octocorals.

I do. Which is the main reason I removed the little critter shortly after I posted the last pic. Better safe than sorry with hitchhikers.