Fish

These "greedy" eels likely retreated into the gloomy depths of underwater caves in search of tasty crustaceans and are adapting to the darkness by going blind, one eye at a time.

A video that captures a shark attacking a gray seal is going viral and marks the first great white shark sighting of the season in Cape Cod.

The victim was surfing off the coast of South Australia when a shark dragged him under. Bits of wetsuit were later found.

Piranhas had become accustomed to the free food discarded in the river. Once first blood was drawn, the school attacked en masse.

During World War II, the sinking of a U.S. Navy ship led to one of the worst known shark attacks in history, with up to 150 killed in a feeding frenzy.

The shark Apristurus ovicorrugatus was identified as a new species over a decade after the first mystery egg cases were found in a Western Australian museum collection.

Oregon State Parks said several lancetfish have washed up on beaches in recent weeks in a highly unusual spate of strandings.

The 14-foot great hammerhead washed ashore on a beach in Alabama. Researchers have since dissected the expectant mother but are unsure exactly what killed her.

The 10-foot-long female stopped breathing after locals tried several times to coax her back into the water. The cause of the animal's death remains a mystery.