zombie flesh eaters (1979)

aka Zombi 2. Island of the Flesh-Eaters. Island of the Living Dead. Gli Ultimi zombi. Zombie. Zombie 2: Gli ultimi zombi. Zombie 2: The Dead are Among Us.
An abandoned yacht drifts into New York harbour, and the subsequent death of a policeman prompts a journalist to investigate. Following the trail to a Caribbean island, he tries to trace the whereabouts of the scientist who owns the boat and stumbles on more than he bargained for.
This is an influential 'video nasty', featuring a number of memorable scenes, including a zombie attacking a shark. Chock full of gore, it also manages to be an effective horror that makes fine use of it's locations. Making the Caribbean look like a tropical paradise, that quickly becomes a hell hole!