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Three Killer whales (Orca) swim along side researchers.

Article

Listening for Clues About Sonar’s Effects on Marine Mammals

A blue-ringed octopus

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How Octopuses and Squids Change Color

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

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A Tale of Sex and Stress in the Ocean

Phoenix swimming with her calf.

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Scientists Use Bioacoustics to Protect Marine Mammals

A narwhal breaches the surface, its tusk pointed to the sky

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Why a Tusk? The real-life unicorns of the sea and the tusks that make them famous

Screenshot from the "Masters of Disguise" video showing a spotted octopus on the seafloor.

Video

Masters of Disguise

A humpback whale breaching in Antarctic waters.

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Humpback Whales in Antarctica: What Are the Whales Doing?

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!

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The Design of a Beautiful Weapon

A beaked whale at the ocean's surface

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Seeing with Sound: Acoustic monitoring of beaked whales

Relatively slow moving, juvenile plane-head filefish Monacanthus hispidus (Monacanthidae) travel along with the algae. They pick off and eat small animals as they move around in the rotating sargassum ball. Adult filefish only grow to be about 11

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A World Adrift: Life in the Sargassum

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

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Tunicates—Not So Spineless Invertebrates

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

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You Light Up My World!