Orinoco sailfin catfish

All three suckermouth catfishes (family Loricariidae) in Florida have rows of bony plates covering all but their belly area. Sailfin catfish are distinguished by worm-like pattern of dark markings on the head over a dark-golden background; pectoral fins stout with rough surfaces resembling course sandpaper; disc-like, protrusible mouth is under the head, and used like a suction cup to attach and feed on algae; females tend to be smaller, and fish larger than 18 inches probably males; lifeless and hollowed-out 'armored' bodies sometimes seen on canal and lake banks