Deep-sea fish adapt to some of the most extreme conditions on Earth. New research analyzing their evolution finds the same ...

Some of the animals “likely arrived during recent El Niño phenomena” when ocean currents “temporarily reversed” direction, ...

Bluefin tuna are an ocean-going fish that grow up to 10 feet long and can weigh as ... The International Union for Conservation of Nature lists two species of bluefin, the Atlantic and the southern, ...

These animals are similar to living species of seahorse. Both are found along most of the UK coastline, with some large populations observed occasionally. But like other small fish, seahorse ...