Parents Guide for
The Blue Lagoon (1980) More at IMDbPro »

Significant nudity, both male and female, often full frontal, but most of the time it is in underwater swimming sequences. This includes both school age children and adolescents. There is an implied masturbation scene. There is a lovemaking scene, which actually is spaced out into several short scenes. There is a childbirth scene. There is a breast feeding scene. The son is nude for the rest of the film doing what toddlers do on deserted islands.

A crab crawls out of the mouth of a dead body.

Later, the skeleton of that dead body is shown, years after it has completely decayed into bones.

A character is threatened by a shark.