With 39 world records and 23 gold medals won over the last four Summer Olympics, Michael Phelps has not competed against many humans who can beat him in a swim race. Perhaps a fish can. Like a really big fish. Like a really big, mean fish.

Like a great white shark?

Exactly like a great white shark.

Yes, Phelps is going to race a great white shark, and the spectacle will air on Discovery Channel during “Shark Week,” on Sunday, July 23 at 8 p.m. ET.

A press release from Discovery announced “Phelps vs. Shark: Great Gold vs. Great White”:

“They are one of the fastest and most efficient predators on the planet: Sharks. He is our greatest champion to ever get in the water: Michael Phelps. 39 world records. 23 Olympic golds. But he has one competition left to win. An event so monumental no one has ever attempted it before. The world’s most decorated athlete takes on the ocean’s most efficient predator: Phelps V Shark – the race is on!”

Details are scant. For example, will the race take place in an ocean or a pool? And is there going to be some kind of barrier separating the shark from Phelps? Our guess is yes, and for our Olympic hero’s sake, we better be right.

The following Sunday night, if he’s still alive, Phelps will be featured on “Shark School with Michael Phelps” on the same channel.

More from the release:

“Michael Phelps joins Doc Gruber and Tristan Guttridge of the Bimini Shark Lab to get a crash course on everything ‘shark.’ They’ll dispel the myths and common misconceptions, teach him how to safely dive with sharks – including how to stay calm when a hammerhead swims two feet above his face – and will get Michael Phelps up close and personal with the incredible power of a great white.”

Phelps posted on social media a few days ago what appears to be a sneak peek of Shark School.

We’ll post odds on Phelps vs. Shark on a later date.