Not new but couldn't find an ID?

[Grimreaperz]

Looked on Lionfish liar and a few other places seemed to resemble either a type of copepod or chiton maybe?

Best picture I could get came in on a zoa frag

 

[GHsaltie]

Looks like a serolid https://www.lionfishlair.com/hitchhikers-guide/isopod-serolid/

 

[Grimreaperz]

Thanks so much! Definitely looks like it.