Creature from the Haunted Sea (1961) on Netflix

CIA agent XK-150 (Robert Towne) is working undercover in a Cuba-like small Caribbean island nation that is undergoing a revolution when he discovers that notorious international playboy, promoter and mobster Renzo Capeto (Anthony Carbone) is planning something with a group of military types loyal to the deposed regime. XK-150 learns that the loyalists leader Colonel Tostada (Edmundo Rivera Alvarez) has liberated the contents of the national treasury and plans to flee the country with the money so that he and his fellow loyalists can plan a counter revolution. Capeto is providing the boat with which the Colonel, his men and the money can leave the island. So, XK-150 posing as Sparks Moran, a notorious gum machine burglar from Chicago, infiltrates Capeto's gang as he manages to get a job on board the boat. The other gang members include Capeto's lover Mary-Belle Monahan (Betsy Jones-Moreland) - a notorious moll who used to push hard drugs to schoolchildren. Her brother Happy Jack Monahan (Robert Bean)- a tennis bum and hired killer who has developed a muscle spasm in his cheek from watching too many Humphrey Bogart movies and finally Pete Peterson Jr. (Beach Dickerson) - Capeto's top henchman who was discovered at Jones Beach where he worked as a pickpocket and has an incredible ability to mimic animal noises.