Sigmund and the Sea Monsters

"The Monster Who Came to Dinner"

Johnny and Scott bring Sigmund home to live in their clubhouse, but the sea monster is nearly discovered by Zelda and the Sheriff when Sigmund's monstrous brothers come looking for him.

Sigmund and the Sea Monsters is an American children's television series that ran from September 8, 1973 to October 18, 1975, produced by Sid and Marty Krofft and aired on Saturday mornings