Henry Winkler's wife says the actor tends to exaggerate about the size of his ... fish

Henry Winkler has been married to his wife, Stacey, for nearly five decades, so at this point, she knows him pretty well.

Including, apparently, when he's exaggerating about the size of his... fish.

The "Happy Days" star and his wife joined Graham Bensinger for an interview recently, where the couple talked about their marriage, how they met and the one activity that somehow transforms Winkler from one of the nicest guys in Hollywood into a fiercely competitive rule-breaker.

Fly-fishing.

CLICK HERE FOR MORE COVERAGE FROM OUTKICK OUTDOORS According to Stacey, her husband might also be padding the stats a little bit.

"You have alleged before that he pads his numbers," Bensinger said.

Winkler immediately looked offended.

"Wait a minute.

Really?" he asked.

Stacey didn't back down.

"I write down in my book exactly," Winkler protested.

"I don't round off.

That I do only in charity." That set his wife up perfectly.

"The biggest charity is your fish size," Stacey fired back.