Sigmund and the Sea Monsters (1973)

S1E2 Puppy Love

Sigmund develops a deep affection for Fluffy, the dog owned by Johnny's girlfriend, Peggy. Meanwhile, Sigmund's family devises a plan to distract him by introducing him to Diana Demon, a sea monster actress he idolizes. Their goal is to pull him away from his feelings for Fluffy and redirect his attention back to Diana.