Coral id?

[Newbie91]

Hey there, my black occilaris has taken a liking to this coral, and I'm not sure what type of coral is is :/ some info would be great. Just want to know if it could be harmful to either coral or clown.

 

[Nu-Nu the eel]

Looks like an elegance coral. Doesnt look very happy.... It might die because the clown keeps annoying it.