Ebirah, Horror of the Deep A.K.A. Godzilla, Ebirah, Mothra: Big Duel in the South Seas, Godzilla versus The Sea Monster, Gojira, Ebira, Mosura Nankai no Daikettō (1966)

A Japanese daikaiju science fiction directed by Jun Fukuda, starring Hideyo Amamoto.
A young man's brother is lost at sea from a shipwreck. He steals a boat that a bank robber has already stolen to look for his brother. They are attacked by a giant lobster and was up on an island where an illegal nuclear weapons factory is using slave labor. There, they awaken Godzilla while the slave labor send for Mothra to save them.
This was cheesy. I thought the surf soundtrack fit well with the marine monster and Godzilla's dance scene with the jets was hilarious. There was a scene during the monster fight where Godzilla lifts his head out of the water and Ebirah smacks him with a claw. I thought that was well-edited and the foley was funny. The monsters' acting was good, even if the human acting was sub-par. Overall, a regular Godzilla flick with some unintentional humor. I rate it adequate.