Please ID!!!

[Daydream Corals]

I just picked one of these off the other day! Now I found another bigger and finally kept it so I can figure how what it is never thought it would look like this! Kinda looks like a Nudi of some sort? Or a slug ? Whatever it is it doesn't look good! Please help me ID

 

[Crabs McJones]

It almost looks like a zoa eating nudibranch, but i've never seen one black before.

 

[Daydream Corals]

That's what I think it is . I found one the other day on my zoa rock took it off but no zoas looked like they are eaten or upset. Then I found this one on my Green star polyps!!

It almost looks like a zoa eating nudibranch, but i've never seen one black before.