It was bigger than rest of fish in tank by at least 2 inches. I had at the time, peacocks, mbuna, and a couple small haps. Must have been the disadvantage being bigger creating it to be the target. I added it at night with no light. Thought it would be OK. Was fine in the morning when I left. I never noticed the holes around the mouth area like that before. Maybe I just never paid attention, is that normal?