Scientists on a mission to explore Costa Rican waters made incredible scientific discoveries along the way: identifying four new species of deep-sea corals and at least eight other sea creatures.

One of the world’s “rarest sharks” was recently discovered by fishermen off the coast of Wales.

Self-described Japanese “Tuna King” Kiyoshi Kimura paid a record $3 million for a 612-pound (278-kilogram) bluefin tuna at the first new year’s first auction in Tokyo on Saturday.

A strong storm likely caused a massive Atlantic bluefin tuna to wash up on a beach in Scotland over the weekend, creating quite a spectacle on the island of Sanday.

Divers have recently found the barred knifejaw, a fish native only to Japan, swimming in the waters of Monterey Bay, Calif.

Dozens of people offered suggestions — from a flying squirrel fish to a saw shark.

A massive mola mola sunfish was confused for shark during an open water race in North Carolina on Saturday.

For nearly a decade, researchers with Virginia Commonwealth University in Richmond would conduct a trawl survey on the James River, never to come across any baby Atlantic sturgeon — a species that was listed as endangered in 2012.

Graphic photos show a pair of great white sharks devouring a whale in Cape Cod Bay.