The marine photographer who captured the footage said it could be the world's first recorded sighting of a black seadevil ...

However, there's another strange fish that can't swim, and it looks almost exactly like the Cookie Monster from Sesame Street ...

Despite humanity looking at the ocean for as long as humans have strived ... Here are some of the biggest fish in the oceans.

The juvenile fish recently hatched from eggs that scientists deposited in the gravelly riverbed of the North Yuba River last ...

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The intriguing shapes and colors of sea creatures are turning up in gold and silver, diamonds and aquamarines. Ancient ...

If your dream getaway involves turquoise waters, coral reefs, and unforgettable wildlife encounters, Ningaloo Reef is calling ...

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Most ocean fish are terrible parents ... squiggly ribbons that run parallel to coasts. Some larval fish swim to slicks, some drift, as do eggs not yet hatched. Predators converge on slicks ...

The footage, captured in Spain's Canary Islands, shows the female fish, whose Latin name translates to "black sea monster," swimming through the light-filled ocean waters off the coast of Tenerife.

This is only the second time the species has been recorded while alive. “I thought it was A.I.,” says fish biologist Kory ...