Guy who has it said that it was only 4 inches so it couldn't be a grown grouper, the mouth looks too small to be a groupers to me. I dunno, it's cool though, so I wanna find out.
yup, a wrasse, prolly from the same family as Maori (slingjaw, broomtail, maori)
beautiful fish, I saw one recently at an LFS, must be coming in to the US now
not a grouper, but looks like it resembles a harlequin tusk, notice the teeth? Like tusk meets christmas wrasse almost. Nice looking fish. It is probably DEFINITELY a wrasse.
I think it is the same wrass we had. put a post for polar she did identify it a while ago but I forgot the name. It is cool it changes colors all day long.
Here is a piclooks a little different but when feeding they looked the same. As I said it changed color and patterns often.