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Mantis shrimp have built-in polarized vision to help them see underwater—and maybe even communicate.
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Built-in Underwater Polarized Lenses?

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The head of a turtle-headed sea snake.
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A Turtle or a Sea Snake?

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The frogfish uses camouflage to hide from predators.
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Three-spot Frogfish

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This nudibranch is making a comeback to a location it hasn't been to in years along the California coast. First discovered off the coast of Southern California in 1902, Felimare californiensis was thought to be extinct in the region sin
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The Comeback Sea Slug

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A round sea potato with hair-like spikes laying flat against its body.
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Sea Potato

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Cardinalfish dads protect their eggs by gingerly carrying them in their mouths.
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Cardinalfish Dad with a Mouthful of Eggs

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A bottlenose dolphin carries a sponge, which it uses as a tool to dig up prey from the seafloor.
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Sponge-Wielding Bottlenose Dolphin

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Photo of a mantis shrimp
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Mantis Shrimp Carries Eggs

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Laysan albatross with a chick in a volcano looking nest on the ground made of earth.
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Laysan Albatross with a Chick

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A Longspine seahorse off the coast of South Africa.
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Longspine Seahorse

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A polar bear and its cub in Arctic National Wildlife Refuge, Alaska.
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Polar Bear Mother and Cub

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The right whale Phoenix, and her calf, swimming off the coast of Florida.
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Phoenix and Her Calf Sighted in February 2012

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