Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and ...

Marine animals can be fascinating and quite beautiful. However, you should not approach some of them. Certain fish and ...

Appearances can be deceiving in the animal kingdom. Some of the most charming creatures harbor hidden dangers beneath their ...

Only a scattering of light penetrates the deep water, more than 300 feet beneath the ocean surface off the coast of Guam.

For deep reef divers, descending into the ocean’s mesophotic layer can feel like exploring the moon. Discovering never-before ...

Sharks: The Ocean's Most Misunderstood Predators Thanks to decades of Hollywood terror, sharks have earned one of the most fearsome reputations in the animal kingdom. Movies like "Jaws" have painted ...

Leopard seals rank among the largest seal species on Earth, with adult females reaching nearly 12 feet in length and weighing ...

Beneath the waves are millions of dangerous sea creatures – and they exist on every continent, from Oceania to Asia and ...

The Goliath birdeater ( Theraphosa blondi) is the world’s largest spider, with a leg span up to 30 cm (12 in). Its hairy, robust form, and fangs capable of piercing small prey, give it a looming ...

As companies search underwater for resources, scientists are taking inventory of the ocean-dwelling creatures that could be ...