Largest venomous snake in U.S. spotted swimming off Florida Keys

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The captain of a charter boat who was fishing off the Florida Keys spotted a deadly species of rattlesnake swimming in the ocean.

Instead of finding fish, Ted Wilson found a five-foot Eastern diamondback snake, which is the largest venomous snake in North America, according to National Geographic.

Wilson took cellphone video of the snake, and told WSVN that it was swimming toward the boat and "appeared to be island hopping."

“I’ve never seen a rattlesnake in the Keys, much less a five-footer swimming in the middle of open water,” a person can be heard saying in the video. It has been viewed more than 150,000 times on Facebook.

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