Help is this alien found in my tank safe?

[JJ Ligs]

Hey found this monster free floating in my water after lights out. I think it is a Caulerpa Slug which says it is reef safe, but want to be sure as I have lots of coral! I do not want to hurt it, if it is harmless. He would be welcome to go back to his little slug life But if not it is the toilet for him.

 

[StatelineReefer]

Looks like a sea hare. But then again, without a very specific microscopic inspection, most nudibranchs are on the 'might be this, might be that' list of conspecifics.

Because of the benefits of sea hares, I would suggest leaving it in a jar with a live rock full of hair algae and see if it doesn't 'mow the grass' for you... if so, then peachy, you have a safe nudibranch/slug... if not, it will starve anyways as almost every nudibranch or sea slug has a specific, obligatory diet.

 

[JJ Ligs]

I have no hair algae in my tank but I put him in my mushroom nursery which is currently vacant till I know more. Figure with him secure in there he can wait till later verdict is found.

 

[sixty_reefer]

elysia nudibranch mostly herbivore

 

[JJ Ligs]

elysia nudibranch mostly herbivore

Mostly?

 

[sixty_reefer]

Most species if not all

 

[JJ Ligs]

Most species if not all

So I can probably let him be then. I have no issues in my tank other then my butt of a Blenny right now pulling Paly heads off.