'Shark Wranglers': Battling To Help A Great White Recover From A State Of Tonic Immobility (VIDEO)

On the latest episode of "Shark Wranglers" (Sun., 10 p.m. ET on History) the OCEARCH crew were tagging a Great White shark on deck when something went wrong.

When they're rolled onto their back sharks enter a state of paralysis known as tonic immobility, but normally recover after about 15 minutes.

However, this shark was not recovering, so crew member Ryan Johnson began the established recovery measures.

"If the shark doesn’t swim," he said, "we can at least lash it to the side of the boat and can swim it manually."

So, after Brett McBride placed a barbless hook in the shark's mouth that's what they did. The crew towed the shark alongside the boat to get water flowing through its gills and wake it up.

Finally, after about an hour-and-a-half, the shark recovered, bringing the crew to tears.

The aquatic dramas continue on "Shark Wranglers," Sundays at 10 p.m. ET on History.

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