Wondering about the world's weirdest sea creatures? We've compiled this list of the 20 weirdest animals in the ocean to show ...

Although the squid may appear at first glance to have "teeth like a human," in reality the feature consists of "circular, folded lips, of which only the upper and lower portions can be seen." The ...

A team of MIT geochemists has unearthed new evidence in very old rocks suggesting that some of the first animals on Earth were likely ancestors of the modern sea sponge. In a study appearing today in ...

Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.

This is only the second time the species has been recorded while alive. “I thought it was A.I.,” says fish biologist Kory Evans. Black seadevil anglerfish (Melanocetus johnsonii) are deep-sea ...

An entire world lives deep under the ocean’s surface, far from human notice and as bustling as any city. Animals such as tubeworms and clams live crowded around plumes of methane that bubble up ...

When filmmakers slipped a robot crab into a real crab aggregation, they expected curiosity. What they captured instead was a ...