Large octopus with coiled tentacles

Simple octopus Model: Octopus by YahooJAPAN, licensed under CC BY 3.0 .

Simple, ten-armed squid. Model: Cuttlefish by YahooJAPAN, licensed under CC BY 3.0 .

Ten-armed, large squid

Ten-armed, large squid

Eight-armed squid with a grim expression

Eight-armed squid with a grim expression

Eight-armed squid with a grim expression

Thick-skinned, prehistoric mammal that looks like a cross between a hippopotamus and a rhinoceros

Thick-skinned, prehistoric mammal that looks like a cross between a hippopotamus and a rhinoceros

Thick-skinned, prehistoric mammal that looks like a cross between a hippopotamus and a rhinoceros

Thick-skinned, prehistoric mammal that looks like a cross between a hippopotamus and a rhinoceros

Thick-skinned, prehistoric mammal that looks like a cross between a hippopotamus and a rhinoceros

Thick-skinned, prehistoric mammal that looks like a cross between a hippopotamus and a rhinoceros

Thick-skinned, prehistoric mammal that looks like a cross between a hippopotamus and a rhinoceros, lying dead on the ground with its stomach open

Standing Triceratops Model: Triceratops by YahooJAPAN, licensed under CC BY 3.0 .

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Simple trilobite. Model: Trilobite by YahooJAPAN, licensed under CC BY 3.0 .

Large toucan with wings spread