Marine Biology

For the first time ever, a unique cooperative hunting arrangement between dolphins and orcas has been documented. Researchers believe killer whales find salmon by tailing dolphins, who in turn benefit from bite-sized fish pieces.

On a remote reef, endless streams of bubbles rise from cracks in the seabed into the shallow water, fed by an underground volcanic system. For scientists, this phenomenon has become a kind of crystal ball, revealing the changes that await marine life.

A new species of jellyfish, named after a samurai warrior, has been identified off the coast of Japan and its discovery is more than just a biological curiosity. It reveals ocean currents changing and marine migration routes shifting.

Oceanic manta rays make extreme dives of more than 1,200 meters – three-quarters of a mile – but it's not to feed. Instead, the mantas are calibrating their own kind of Google Maps as soon as they find themselves out beyond the continental shelf.

Old Nazi warheads and US warships have been reclaimed by a new army of diverse marine life, as scientists for the first time uncover how nature has made use of the munitions and fleets that ended up dumped in waterways during the two world conflicts.

A mysterious marine epidemic has killed billions of sea stars from North America’s Pacific coast. After more than a decade of unanswered questions, scientists have finally traced the disaster to a single bacterial species.

Leopard seals may be one of Antarctica’s most fearsome predators, but these vocalizers sing with the structured charm of a nursery rhyme. In a new study, researchers discovered that the underwater vocal patterns of these mammals resemble human song.

They’ve been crawling across the seafloor for 500 million years, but some sea stars have amassed such a population they're eating entire reefs alive. Now, a discovery about their spine-speaking chatline gives us a leg up in this ecological arm's race.

The first known cases of accidental choking have been discovered, dating back 150 million years, when some ambitious fish got more than they bargained for while picking off algae from squid-like carcasses. It's history's oldest mealtime misadventure.

Scientists have discovered 230 new giant viruses (girus) found to be the unseen engineers of marine ecology, impacting global carbon cycling and energy flow across the world’s oceans.

Researchers have identified a fascinating behavior in killer whales: they sometimes offer to share their prey with humans. And while the orcas haven't gone on the record to confirm it, it's likely their way of building relationships with us.

Killer whales have joined the rare club of animal species that craft tools out of nature and use them to their advantage. For the first time, they've been observed making a brush of sorts out of kelp and then using it on each other.