More Monster Mercenaries (1970)

Sinopsis

Delta Team 4 is back, and this time they're taking on the monster of all monsters - the Megalodon! With a little help from that heroine of the seas, The Little Mermaid, and a deranged wannabe pirate named Joe Bruno, the countdown to carnage commences! Interstellar intrigue and deep sea danger await, in The Little Mermaid vs. Mega Jaws.