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This male dancing fiddler crab (Uca terpsichores) has built a sand “hood” at the entrance to his burrow, which he hopes will attract females to his humble abode—as if that big beautiful claw of his weren't enough!
Article

The Design of a Beautiful Weapon

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A screenshot from the video showing a fiddler crab with a large claw.
Video

Claws Out: Fiddler Crabs Do Battle

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A Caribbean hermit crab (Coenobita clypeatus) crawls on the forest floor.
Article

The Great Hermit Crab Migration

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A female (top left) and male Photerus annecohenae. Note that females are larger than males (sexual dimorphism) and that males have bigger eyes.
Article

You Light Up My World!

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Hundreds of illustrated red crabs gathering on sand with Santa hats.
Article

Here Comes Santa Claws

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A blue-ringed octopus
Article

How Octopuses and Squids Change Color

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A coral has just spawned. Each of the hundreds of polyps releases a small pink bundle of sperm and eggs.
Article

A Tale of Sex and Stress in the Ocean

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