In the beginning we see a woman on top of a man; he has his hands over her breasts so there's no nudity, just them panting.

The party consumables are sexually themed; the birthday cake is in the shape of breasts and a character makes an alcoholic drink called a "Screaming Orgasm".

At one point, a man is underwater and his rear is seen several times, but frontal nudity is only vaguely seen once as a silhouette in the water.

Two brief frontal shots of a man underneath the water as a woman tried to pull him back up. Not very clear, but there nonetheless.

A boat passes by with two naked women dancing on top of it.

Another man's rear is seen in the water from above. Pretty minor.

There are brief shots showing nudity in the water, seen from above. This is minor.

A man is seen with blood coming out of the side of his face/ear.

A man is stabbed; there are several shots of blood in the water. Blood also marks the side of the boat. Later, another character tries to wash this blood off with seawater.

A man is punched in the face.

A man punches the side of the boat, bloodies his hand.

Multiple uses of "fuck".

Mild profanity in jocular context.

A man sings "For he is a jolly good a**hole".

A lot of profanity used in the context of extremely stressful and panic-ridden moments.

A character attempts to smoke a cigarette but isn't allowed to and later complains about needing a cigarette.

Characters can be seen drinking from beer bottles.

Small amount of drinking and one character's discussions about smoking.

Jokes about "screaming orgasm" drinks.

The infant is left alone on the boat after all of the characters are trapped outside of it. She can be heard crying in multiple scenes and is found on the floor (alive) by her mother, after rolling out of the bed, later in the movie.

A character suffers PTSD from losing her father to drowning as a child. She goes into shock when she is thrown in the water and the scene becomes disorienting, from her point of view.

Several frightening and disturbing scenes throughout the movie, related to drowning, moments of great tension, some fighting.

A significant theme in the movie is the premise of drowning, which appears several times and carries an air of dread, hopelessness and death.

Several scenes involving losing a loved one, sometimes getting very intense and emotional.

Some scenes involving a child searching for her father in the water around her and crying, which are revisited throughout the movie.