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An adult and juvenile killer whale frolic in the water.

Article

Menopausal Moms: A Mammal Mystery

A screenshot from the video showing a bioluminescent seastar.

Video

The Weird, Wonderful World of Bioluminescence

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

Like other cephalopods, the common cuttlefish (Sepia officials Linnaeus, 1758) possesses serious brain power.

Article

So You Think You're Smarter Than a Cephalopod?

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

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

Article

A World Adrift: Life in the Sargassum

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

Article

The Great Hermit Crab Migration

A school of mahi mahi.

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From Larvae to Adults – Finding Impacts of an Oil Spill on Mahi-Mahi

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!

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

Article

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

A humpback whale breaching in Antarctic waters.

Article

Humpback Whales in Antarctica: What Are the Whales Doing?

Thumbnail of a cartoonish octopus.

Video

Why the Octopus Brain is so Extraordinary