andregurov;2829685; said:It's a Pseudacanthicus sp., potentially P. spinosus. Just look at the mouth for confirmation on the genus. The flash seems to wash out the fish's true color, leaving it looking black w/white spots on some shots, then brown w/brown spots on others. It might be one of the other L # pseudas ... can't tell with those photos.
Whatever it is, it is certainly a large one!