Factual error: Our heroes find a boat belonging to shark poachers, smashed to pieces by the Meg. Floating about in the debris are the bodies of a number of dead sharks. Sharks do not have swim bladders and dead sharks do not float - they sink.
Factual error: Lori takes a screwdriver towards her left-hand side of her abdomen. The doctor says it just missed her liver, and she has lost a lot of blood. The liver is on the right side of the body and nowhere near where she took the injury.