Body length: up to 2.7 m
Up to 2,300 kg
Unknown; populations declining
Tropical and temperate oceans worldwide
Bigger than big. The ocean sunfish is , in fact, the largest and heaviest bony fish in the world. Despite its size and bizarre body shape, which creates the appearance of a huge floating head, this sunfish is a fast and accomplished swimmer, rivaling sharks for speed and penguins for grace in gliding underwater. Its eyes are also very large, which comes in handy for scanning the area while foraging. Nevertheless, the ocean sunfish often runs afoul of commercial fishing; ending up as bycatch is the biggest threat it faces.