hole on the head

Unfortunately my bi color blenny (got him Nov 2) has a literal HOLE in his forehead, and abrasions on his face. Took him back to the reef store, and decided not to swap him because I love his grumpy face. They confirmed, yes, there is a small chunk of flesh missing from in between his eyes. They...

Hi all, This is my 1st thread here and unfortunately it is a question about some disease that I struggle to diagnose and eliminate for several months but it enhance further. Some images attached and any help on diagnosis and suggested treatment is most appreciated. During April some unclear...