What is this? Slug?

[Caitlin0418]

Hey everyone. This appeared in my tank today and I have no clue what it is. It seems to be some kind of slug? I have had a purple sea hare before that died and a lettuce sea slug that disappeared. But I never bought anything like this. Help!?! Thanks!!

 

[SlugSnorter]

give a pic in whites. Some kind of nudi maybe.

 

[monkeyCmonkeyDo]

Elephant slug?

 

[SlugSnorter]

Elephant slug?

too thin

 

[Reefer Reboot]

Look up Dendrodoris nigra for ID match.

 

[Caitlin0418]

Look up Dendrodoris nigra for ID match.

That’s it! Thank you so much!