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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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Phoenix swimming with her calf.
Article

Scientists Use Bioacoustics to Protect Marine Mammals

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A blue parrotfish hides among coral.
Article

Tough Teeth and Parrotfish Poop

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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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The Komodo National Park site in Indonesia was inscribed on the World Heritage List in 1991. The site hosts "Komodo dragons" (Varanus komodoensis), a unique species that exists nowhere else in the world and is of great interest to scientists studying evolu
Article

Tunicates—Not So Spineless Invertebrates

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Small red hyperiid.
Slideshow

The Hyper Eyes of Hyperiids: How Some Shrimp-Like Creatures See Light in the Deep Sea

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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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Giant Pacific Manta Ray, Roca Partida Sea Mount, Revillagigedos Islands, Mexico
Article

Tagging and Tracking Animals Underwater

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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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A blue-ringed octopus
Article

How Octopuses and Squids Change Color

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