Francesco Sercia was taking a refreshing dip in the crystal-clear waters off an island in Peru. Suddenly, a curious sea lion popped up right next to him! The sea lion seemed completely unafraid, and ...

Long before ships sailed the oceans or factories hunted whales for oil, humans living near the Bay of Biscay were already ...

Southern California's harmful algae bloom finally ends as SeaWorld rescues and rehabilitates affected marine animals including sea lions and pelicans.

The South Australian government says it is “helpless in the force of nature” as it grapples with a bloom responsible for ...

Fusulines thrived in cold seas but vanished twice when warming from volcanoes rapidly spiked ocean carbon levels.

Sharks, rays, octopus and penguins are among more than 330 species killed by the mass algal bloom washing across South Australia’s coasts. It won’t end there.

The never-before-seen footage of sea creatures struggling in fishing nets is featured in National Geographic’s new documentary Ocean with David Attenborough.

Here are three of our most recent eye-catching stories. → 'Large'-eyed creature found lurking in ancient Roman mine → 2-foot-long sea creature with 'fang-like' teeth discovered as a new species ...

The discovery — published June 23 in Current Biology — constitutes the “first evidence” recorded of tool-making by marine mammals. “ We were amazed when we first noticed this,” Michael Weiss, the ...

Behavioral ecologist Michael Weiss was browsing through new drone footage of the orca pods he studies in the Salish Sea when ...