It's a find 65 million years in the making.

A British man was walking his two dogs on the coasts near Stolford, Somerset on Saturday when he stumbled upon what is believed to be the fossilized remains of a 65-million-year-old ichthyosaur, The Sun reports.

"I often go to the beach walking with my dogs, and when the tide goes out we go to the rocks because they like playing there," Jon Gopsill said to The Sun. "We were at the beach when I saw this thing and thought 'What's that?' so I went a bit closer and thought 'wow'. I realized that it was amazing, museum-quality stuff. As soon as I saw it, I knew I found something special."

MASSIVE 205M YEAR-OLD ICHTHYOSAUR FOSSIL DISCOVERED, 'ONE OF THE LARGEST ANIMALS EVER'

"I thought it was obviously a fossilized sea creature, possibly an ichthyosaur," Gopsill, 54, added. "I was just blown away to see it there. It really is incredible that is has survived for such a long time and is now just there for everyone to see."

Though the five-and-half-foot fossils need to be thoroughly examined, experts are almost certain it is an ichthyosaur.

"Looking at this specimen, based on the number of bones in the pectoral paddle, the apparent absence of a pelvic girdle, as well as the distinctive 'hunch' of the back, this is likely to be the remains of an ichthyosaur," Dr. Mike Day, a curator at London's Natural History Museum, told The Sun. "It is not possible to identify the exact type of ichthyosaur from these images alone, however."

STUNNING DINOSAUR DISCOVERY: EXPERTS MAY HAVE UNEARTHED A BABY TYRANNOSAUR FOSSIL IN MONTANA

Ichthyosaur means "fish lizard," an apt way to describe the giant sea-dwelling creature. The earliest known ichthyosaurs had long, flexible bodies and likely swam similar to modern-day eels, according to an article from the University of California Berkely.

Some ichthyosaur fossils discovered have shown the creatures to give birth to live, developed young. Unlike dinosaurs, which ichthyosaurs have been confused for, they did not lay eggs.

It's still unclear which group of modern-day vertebrates are the closest relative to ichthyosaurs, but researchers have suggested they may have been an offshoot of diapsids, which includes dinosaurs, birds, and pterosaurs. Others have suggested that it may actually be a distant relative of sea turtles.

A number of ichthyosaurs fossils have been discovered recently. In April 2018, the massive jawbone of a 205-million-year-old ichthyosaur was discovered in southwestern England, making it "one of the largest animals to ever live." The fossils of a 180-million-year-old ichthyosaur, which also contained evidence of blubber and skin, were discovered in December 2018.

In January 2019, researchers used 3-D technology to unlock the secrets of a nearly 200-million-year-old ichthyosaur skull, which was discovered in a U.K. farmer’s field in 1955.

CLICK HERE TO GET THE FOX NEWS APP

Fox News’ James Rogers contributed to this article.