In case you were wondering, it is indeed possible for a shark to bite off more than it can chew.
As evidence, we submit this Greenland shark, which two good samaritans recently rescued from choking to death on a moose. One of the men, Derrick Chaulk, told the Canadian Broadcasting Corporation he came across the shark while driving past a harbor in Newfoundland last weekend, then approached it to find a large piece of moose hide sticking out of the animal's mouth.
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The shark and one of the rescuers.
After another man, Jeremy Ball, stopped by to see the animal, the two set about saving the shark. They guess it weighed 250 pounds and was just over 8 feet long.
"He swallowed [the moose] and got it halfway down and couldn't cough it back up and couldn't get it all down, and then I think the tide brought him in," Chaulk told the CBC, speculating on how the shark ended up beaching itself. "A couple yanks [on the moose] and it just came right out."
Another photo of the beached shark.
How, exactly, the shark came across a large chunk of moose is a mystery, though Chaulk speculates a hunter may have cleaned a moose carcass and discarded the remnants in the water. With some help, Chaulk told the St. John's Telegram, the shark was moved to deeper water, where it eventually came to and swam away.
A different Greenland shark, seen here with a diver off the coast of the St. Lawrence River estuary, in Canada.
The Greenland shark inhabits the cold North Atlantic Ocean, where it subsists primarily on a diet of fish and the occasional seal. Some Greenland sharks have even been found with pieces of polar bear in their stomach. According to Discovery, some scientists believe the Greenland shark may grow to a size larger than the great white shark.
Because of the Greenland shark's preferred range of extremely cold, deep water, it hardly ever encounters humans. As such, attacks on humans are extremely rare. Remarkably, based on limited research, scientists hypothesize that the shark has a life expectancy of at least 200 years.