Raw size, bite force and pound-for-pound punching power all count as strength, and each one crowns a different animal.
1Blue WhaleThe largest animal ever, with a tail stroke that moves a body of up to 150 tonnes.1000pts
2Atlantic Goliath GrouperA 300-kilogram reef fish that swallows prey whole, sharks included.622pts
3Leopard SealA powerful Antarctic seal that can shake a penguin out of its skin.551pts
4OrcaA pack hunter strong enough to ram and drown whales many times its size.551pts
5Southern Elephant SealThe largest seal, whose bulls fight bloody battles weighing up to four tonnes.551pts
6WalrusA one-and-a-half-tonne giant that hauls itself onto ice with its tusks.466pts
7Whale SharkThe largest fish, a slow but enormously powerful filter-feeder.466pts
8Saltwater CrocodileThe reptile with the strongest bite ever measured in a living animal.466pts
9Sperm WhaleThe largest toothed predator, which dives over a kilometre deep to battle giant squid.363pts
10Colossal SquidThe heaviest invertebrate, armed with rotating hooks on its arms.363pts
11Giant Pacific OctopusAn octopus whose suckers can hold many times its own weight.363pts
12Great White SharkA two-tonne fish that can launch itself fully out of the water after a seal.0pts
13Humpback WhaleA 30-tonne whale that can hurl its whole body out of the sea.0pts
14Peacock Mantis ShrimpA small crustacean whose club strikes with the force of a bullet.0pts
15Tiger SharkA heavy-jawed shark that bites through turtle shells.0pts
16Bowhead WhaleAn Arctic whale that smashes through sea ice with its skull to breathe.0pts
