What sea animal kills sharks?

Answer 1

A killer whale, electric eel, pods of dolphins and also sharks are cannibals which means the eat each other. But it depends on which shark and their size like the great white's size is massive and others that are smaller like the port jackson shark. Hope that helped. ;)

Answer 2

Perhaps the best known creature that dines on sharks' eyes is a strange, 3-centimetre-long, pinkish-white copepod known as Ommatokoita elongata, which permanently attaches itself to the corneas and associated tissues of the Greenland Shark (Somniosus microcephalus). You can find gorgeous photographs of this creature attached to the eyes of free-swimming Greenland Sharks in the September 1998 issue of National Geographicmagazine (pages 60-71).