Five-metre long oarfish discovered off California coast

A marine science instructor snorkeling off the Southern California coast spotted something out of a fantasy novel: the silvery carcass of a five-metre, serpent-like oarfish.

Jasmine Santana of the Catalina Island Marine Institute needed more than 15 helpers to drag the giant sea creature with eyes the size of half dollars to shore on Sunday.

Staffers at the institute are calling it the discovery of a lifetime.

"We've never seen a fish this big," said Mark Waddington, senior captain of the Tole Mour, CIMI's sail training ship. "The last oarfish we saw was three feet [one metre] long."

This photo released courtesy of the Catalina Island Marine Institute shows the crew of the sailing school vessel Tole Mour and Catalina Island Marine Institute instructors holding a five-metre-long oarfish that was found in the waters of Toyon Bay on Santa Catalina Island, California.
This photo released courtesy of the Catalina Island Marine Institute shows the crew of the sailing school vessel Tole Mour and Catalina Island Marine Institute instructors holding a five-metre-long oarfish that was found in the waters of Toyon Bay on Santa Catalina Island, California.

Because oarfish dive more than one kilometre deep, sightings of the creatures are rare and they are largely unstudied, according to CIMI.

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The obscure fish apparently died of natural causes. Tissue samples and video footage were sent to be studied by biologists at the University of California, Santa Barbara.

Santana spotted something shimmering about 10 metres deep while snorkelling during a staff trip in Toyon Bay at Santa Catalina Island, about two dozen miles from the mainland.

"She said, 'I have to drag this thing out of here or nobody will believe me,'" Waddington said.

After she dragged the carcass by the tail for more than 20 metres, staffers waded in and helped her bring it to shore.

This combined picture handout provided by Spanish Civil Protection shows an yet unidentified fish found Villaricos village in Almeria, Spain.
This combined picture handout provided by Spanish Civil Protection shows an yet unidentified fish found Villaricos village in Almeria, Spain.

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The carcass was on display Tuesday for 5th, 6th, and 7th grade students studying at CIMI. It will be buried in the sand until it decomposes and then its skeleton will be reconstituted for display, Waddington said.

The oarfish, which can grow to more than 15 metres, is a deep-water pelagic fish — the longest bony fish in the world, according to CIMI.

They are likely responsible for sea serpent legends throughout history.