A group of holidaying friends get trapped in a cave system with a bull shark in a solidly entertaining b-movie lifted by a toxic central friendship We’ve officially reached maximum shark movie this year, with around six released so far and even more on the way and so the drop of yet another one, in the middle of Shark Week, begs a number of questions: is it in any way essential? Will anyone ever come close to matching what Steven Spielberg achieved with Jaws or, more realistically, Renny Harl...