Cephalopods—the class of animals that comprises octopuses and squids—are ubiquitous throughout the ocean, including in the ...

A squid's bizarre behavior in the deep sea has scientists scratching their heads. Is it hiding, hunting, or both?

While modern octopuses have DNA that consistently gets reshuffled, resulting in some chromosomal mixing, the researchers ...

Ancient mariners' tales of the terrifying Kraken, a colossal sea monster, have been scientifically linked to the elusive ...

Deep-sea creatures exhibit gigantism, with football-sized eyes and van-sized sponges thriving in crushing darkness. These ...

A new study reveals an unknown species of whiplash squid burying itself upside down in the deep sea — a first-of-its-kind ...

Almost a half-mile below Monterey Bay's surface, California scientists recorded rare footage of a seven-arm octopus eating a ...

Perhaps it was hiding from predators. Or trying to catch food. Then again, maybe it just wanted to be left alone.

Fossils from Qatar have revealed a small, newly identified sea cow species that lived in the Arabian Gulf more than 20 ...

Scientists discovered a brand-new species of sea anemone, and it's got a special relationship with a common crab.

Glowing sea animals use bioluminescence powered by luciferin to communicate, attract prey and defend themselves, turning the ...

Dr. Lauren Smith, a marine biologist at research organization Saltwater Life, called the flotsam “an extraordinary find,” ...