During the opening credits we see red-tinged water with sharks and people swimming, a shark bites a large piece of bait on a line and a shark is shown biting a diver's arm and thrashing (no blood is seen).
In a lake, Jess is grabbed by something that's under the surface (it is not shown), she screams and is thrashed back and forth as the water churns and turns red; she swims toward a floating dock, she is pulled off the ladder and back into the water, she is thrashed briefly, and is pulled under (we see the water turn red and she does not re-surface).
A shark bumps the ski that Malik is on causing him to fall in the water and when the boat comes back around to get him, they cannot find him until he is shown on the shore with one arm missing (we see a bloody stump as he collapses).
Malik carrying a spear walks into a lake, his arm is bleeding and blood drips into the water, a shark speeds toward him, he throws the spear and missies the shark, the shark attacks him and bites his leg. Malik pounds on the shark with his fists, finds the spear and stabs the shark 2-3 times; we see the bloody carcass on the beach later and he has a bandage on his leg.
Sara is locked into a shark cage and lowered into the water, a bucket of blood is poured on her, and a shark breaks through the bars of the cage and is shot through the head before it reaches her (we see blood and matter floating in the water).
Nick retrieves a severed arm (we see it, and the blood and tissue at the stump) from a lake and is chased by a shark; he climbs onto a ladder and the shark runs into the pier (no one is harmed).
Nick is tied to a chair next to water where there are several sharks swimming, Greg cuts him on the leg (we see the bloody gash), he is raised into the air and lowered into the water, and a shark spots Nick and approaches as he is raised out of the water.
We see a video of a shark attack and Jess thrashing in the water as it turns red.
Dennis talks about "cookie cutter sharks" and we watch them biting and tearing pieces off two fish heads in the water.
Dennis with a gun threatens Gordon, and then shoots him in the shoulder causing him to fall back off a boat and into water.
Beth stabs Red in the chest and we see a spot of blood on his shirt.
Red throws Sara's dog in the water presumably to be eaten by a shark (we see the dog unharmed later).
A boat runs over something in the water causing the steering and throttle to malfunction; Malik, Sara and Nick onboard jump off before the boat crashes into a dock and bursts into flames (pieces of wood are thrown through the air but no one is harmed).
We see Malik wounded with a very bloody arm wound and many blood-soaked towels next to him.
Malik with a cleaver hacks a large hammerhead and we see blood on the hammerhead and the table around it.
Maya cleans the blood off Malik's hands.
Dennis is shown with a large, jagged scar on his face.
Red is shown with sharp front teeth and he is seen filing them in one scene.
Dennis with a gun threatens Beth and forces her to take off her clothes down to her "bra and panties."
Red with a gun threatens Blake that takes it and points it at him and says, "Bang."
Sara with a gun threatens Dennis that takes the gun and points it at her.
Red grabs Beth around the neck and is about to bite her (his teeth are sharpened to points) but is stopped by Dennis and licks her neck instead.
Dennis touches Sara's face with a large knife blade.
After a confrontation Malik shoves Red against a truck and when Dennis gets involved they nearly fight.
Beth yells at Sara and shoves her.
Malik barges through a door, yells at Nick inside the room and he looks frightened.
Red talks about having made a "blood smoothie" out of Beth.
Dennis talks about another man's head being torn off by a shark while others watch.
Red makes numerous racial remarks to Malik and Maya about "letting the help sit in the front," "we could use some vacuuming on our yacht" and "I could give you English lessons in the back of my truck."
Sara talks about nearly drowning in a diving accident and that she cut Dennis' face open with the propeller of her boat after she surfaced.
A man accuses another man of "PMSing."
Red demonstrates a gun that can be used to kill a shark (it blows a hole in a padded bumper).
Blake shoots a gun in the air to attract help.
Beth pulls down her shorts and sits on a toilet (we see her bare abdomen and do not hear any sounds).
Sara spits out water after Nick performs mouth-to-mouth resuscitation on her.