Some men are seen bare chested.

Seasickness is mentioned.

Dead fish are briefly seen on deck.

None.

One of the archive footage has a man who jumps into water for a sleeping bag he accidentally dropped, and the Kon-Tiki is sailing more and more away from him. Fortunately, he's rescued in the end of this scene.

The Kon-Tiki crew encountered a shark. But nothing disturbing is shown.