On Australia's Ningaloo Reef, researchers and Australia’s richest man are using environmental DNA to unlock the mysteries of the world's biggest fish.

Ocean warming puts fish are at risk of becoming smaller due to the lower oxygen content of warm water, reports a new study.

Sea lions use their whiskers in “task-specific” ways, adjusting the specific way they’re moved depending on what they intend to discover about a particular object.

Dolphins aren't the only animals that use tools — octopuses and otters do too.

During the study that led to this revelation, researchers looked at shark remains found in the scat of the leopard seals as well as visible signs of struggle on the seals’ bodies.

The light of the moon can shape hunting, mating and more in the ocean.

The Monterey Bay Aquarium Research Institute filmed to giant phantom jellyfish — which has 10-foot arms — more than 3,000 feet deep off the California coast.

Branching and boulder corals releasing billions of new coral larvae onto the Great Barrier Reef, which has battled bleaching in recent years.

Winter died at age 16 from a gastrointestinal issue was discovered only a week and a half before her death. Her life story inspired two family-friendly films.