He did battle against Klingons, Romulans, a molten rock monster, advanced intelligence who had no physical bodies but immense intelligent brains, and many other adversaries. So he’s got what it takes to face down the sharks.
sarcasm.....
He changed the conditions of the test.
Remember the Gorn fight? That thing was throwing boulders stuff at him. Bill Shatner used his hand chops to the Gorn’s ear holes to get out of the bear hug of death.