A fun creature feature/disaster flick from the director of the awesome Dead Snow (2009), the incredible The Trip (2021) and the also-a-film Hansel & Gretel: Witch Hunters (2013) among others.
In this, a small town in the USA is flooded thanks to a freak storm, then invaded by many, many bull sharks (and one Great White) who have been attracted by a combination of climate change and the town's giant meat-packing plant, which immediately starts leaking blood into the now encroaching sea.
Two groups of plucky survivors (one the agoraphobic niece of Djimon Hounsou shark researcher and a pregnant meat-packing employee and the other a trio of kids who are not entirely displeased to see the sharks eat their abusive foster parents) try to survive until help comes.
Thrash is perhaps a little bit similar to Crawl (Alexandre Aja, 2019) which offers a similar conceit featuring alligators, not to mention Bait (Kimble Rendall, 2012) which does something very similar with sharks in the Australian town of Coolangatta, but Wirkola knows how to direct action and the script has the sense to throw in some truly WTF moments (why yes, giving birth in floodwater WOULD attract sharks, thanks for asking) which makes this a diverting if unoriginal good time,