Eagle Lake, Mississippi - An avid hunter called it "the hunt of a lifetime!"

John Hamilton made a huge catch with his colleagues at the beginning of September: a 13-foot-long, 750-pound alligator.

But what they found inside its stomach shocked them all.

The group tracked down the animal in Eagle Lake, Mississippi. The real surprise came afterwards, when the reptile was cut open by Red River Processing, reported the Daily Mail.

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Inside its stomach were treasures dating back thousands of years, including an 8,000-year-old Native American spearhead.

An expert who examined more of the contents said its stomach also contained a mysterious piece known as an iron "plummet," believed to date back to 1700 BC.

Red River Processing shared that the alligator had produced the "shock of the year."

James Starnes of the Mississippi Department of Environmental Quality, who examined photos of the discoveries, said that some objects dated back to about 5000 to 6000 BC.

"The plummets, we really have no idea what they were used for," Starnes said. "These things had some significance, but we have no idea. We can only guess."

The trend to hunt and cut open the stomachs of alligators in the region began in April, when the processing company dissected alligators and began to make curious finds, including dog tags, bobcat claws, feathers, turtle shells, and bone fragments.

Alligators eat gravel and rocks to aid their digestion, which causes many unwanted objects to end up in their stomachs – and get stuck there forever.

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Hunting the giant reptiles is legal in certain Southern states, including Mississippi, South Carolina, Texas, Florida, Georgia, Alabama, and Arkansas.

"What a hunt!" Hamilton said after his latest find.