@Ursus I am not good with marine fish and I thought it was a grouper as it vaguely resembles the dusky groupers Antwerp also has, and I didn't connect it to the sweetlips/grunts group. Upon research I do see some smallish differences now, so I have learned something.
@KevinB
Glad you learned something new! Mistakes can be maybe by anyone, you aren't wrong in that it looks like a grouper, arguably the most grouper-like member of the grunt family!