Marine

Horned helmet (Cassis cornuta) hunting red pencil urchin (Heterocentrotus mamillatus)

Slow-Speed Chase

Off the coast of Hawai‘i, two well-armored invertebrates face off.

Latest in Marine
coral
The Secret Sex Lives of Deep, Dark Corals

A unique fjord in Chilean Patagonia gives scientists a chance to unlock the reproductive secrets of cold-water corals that typically live thousands of meters below the ocean’s surface.

A chambered nautilus and fuzzy nautilus swim side-by-side. Photograph by Peter Ward
Downward Spiral

The nautilus’s lineage made it through all five of Earth’s previous mass extinctions. But can it survive the Anthropocene?

Spotted eagle rays featured in "Seeing Spots"
Seeing Spots

Spotted eagle rays’ distinctive markings are turning out to be important identifiers, and may become essential for their protection.

Header image for Bringing out the Dead - Deep sea octopus Benthoctopus johnstoniana
Bringing out the Dead

By sinking a wide array of carcasses into the deep ocean and studying what turns up when they fall, scientists are learning about some of the world’s most exotic scavengers and the roles they play in the darkness.

A striped marlin pursues baitfish off the coast of Baja California Sur.
Billfish Bounty

A striped marlin slices through a shoal of baitfish, a beautiful reminder of the struggle between predator and prey—as well as the fragility and importance of healthy ecosystems.

Comb jelly (Cestum veneris)
Northern Lights from the Deep

What could easily be an atmospheric apparition is in fact a formidable predator, and a critical member of its strange, open-ocean ecosystem

The Tuna Herders

Climate change has forced these Galápagos sea lions to turn to a new food source. Since they can't outswim their prey, they use wits and teamwork instead.

king penguins (Aptenodytes patagonicus)
Facing the Day

Before embarking on an icy fishing expedition in the Southern Ocean, king penguins pause to soak up the morning’s first light.

Minipizza Batfish (Halieutaea stellata)
Mystic Minipizza

This might be your only chance to meet the best-named fish in the sea.