The heaviest bony fish ever caught weighs in at a staggering 5,070 lbs. (2,300 kilograms). Mola alexandrini has a relatively small mouth and its teeth fused into a parrot-like beak. It can reach up to 3.3 m (11 ft). Their body is flat and round, with large fins that they swish back and forth to propel themselves with as they swim horizontally. Mola alexandrini hav no caudal bones, ribs, and pelvic fins and have fused vertebrae, leaving only their median fins to propel themselves.