Invert ID please

[EpicWin]

Anyone know what this guy is? He came in on some helmedia. Should I put him in my dt?

 

[cromag27]

Looks like a caulerpa slug.

 

[Salty1962]

@Lionfish Lair ?

 

[Lionfish Lair]

That's an eylsia. There's one that's called a Halimeda Slug and it's a Elysia pusilla. Of course I can't ID it that specifically, but it's only logically for that to be the species where it's riding in on its food source.