The habitat of one of the world’s cutest endangered animals is being threatened by human-caused climate change. The Caspian seal is the only marine mammal found in the 143,200-square-mile Caspian Sea.

The Mesozoic Era extinctions formed the world as we know it today. Read about what caused them and which animals survived.

A team of marine scientists has uncovered what appears to be a previously unknown species of sea squirt during a deep-sea ...

In fact, all our favorite marine animals – sharks and dolphins, turtles and rays, and all those pretty colored fish in our ...

Researchers took advantage of a rare chance to explore a new expanse of seafloor exposed by the breakup of an Antarctic ice ...

Two tiny sea creatures with translucent bodies found on the California coast are both new species. They’re sea slugs, part of ...

Ecosystems which have never been seen before are being accidentally created by humans. They offer a stark look into the ...

"Twins! She has another baby," Judith Pardo-Pérez, a paleontologist at the University of Magallanes in Chile who first ...

Off the coast of Brazil, a scuba diver captured something remarkable on video: a wrasse fish gripped a mollusk in its mouth, ...

The Canadian lead author of a new study on the migration of humpback whales is sounding the alarm on how climate change could ...

The ship was travelling to a remote outpost 5,000km south of Australia when the discovery occurred. Find out more.

In recent years, heart-rending images of dead or dying sea mammals and fish, their stomachs stuffed with plastic, have ...