Parents Guide for
El buque maldito (1974) More at IMDbPro »

There are women in bikinis, but no explicit nudity.

A woman's neck is clawed by a zombie which leaves a bloody mark, and her head is later chopped off by a zombie revealing a brief shot of her headless corpse. Other than that scene there is not very much violence, although some of the zombies get shot in a few scenes but it's neither graphic nor gory.

The movie centers around zombies, which are very dark beasts in this movie and have frightening appearances. There are some murder scenes, as noted, and also some scenes referencing satanism and shots of a boat on fire.