***½/****
starring Kaya Scodelario, Barry Pepper, Morfydd Clark, Ross Anderson
written by Michael Rasmussen & Shawn Rasmussen
directed by Alexandre Aja

by Walter Chaw Haley (Kaya Scodelario) swims in college. She's good. But Alexandre Aja's economical, fierce Crawl opens with Haley coming in second in a freestyle leg. Although she takes it in stride, while talking to her sister and infant nephew a little later she makes snapping gestures with her mouth that hint at some intensity driving her and perhaps seeping into her familial relationships. A quick flashback shows a younger Haley being coached by dad, Dave (Barry Pepper), who tells her not to give her competitors the pleasure of seeing her cry. He reminds her that she's an "apex predator." The script, by the team of Michael and Shawn Rasmussen, is a marvel of spartan efficiency. It's a bear trap. The prologue sets up in just a few brief strokes that the film will be about perseverance, programming, family…and apex predators.