Weird Slug ID

[cwerner]

Has anyone ever seen one of these before and can give an ID? I'm not having much luck ID'ing it. It seemed to be moving slowly across the glass like a slug.

White light:

Blue Light:

 

[DinoMagnet]

Sea hare possibly?

 

[vetteguy53081]

Nudibranch for sure. Color , im not sure. Any pics under white light ?

 

[cwerner]

Nudibranch for sure. Color , im not sure. Any pics under white light ?

It's quite purple under the white light still.