You can see the thinking that has gone on here why not combine the two most popular B movie fads of the 2010s, the gonzo killer shark film and the zombie film? Alas, while you can see that this was an idea and a title that the writer/producers could instantly sell, nobody put much thought into how it might work. A zombie shark prowling about doesnt look too different to a regular shark. There is one scene early on where a dead shark washes up on a beach and startles everybody by returning to life and a couple of other minor scenes with a still-alive severed sharks head. However, the film seems to have run out of any ideas about what to do with zombie sharks after that point. To justify the concept, the script also sees the need to throw in some contrivation about the zombie shark turning the people it bites into zombies too, although these never feature much throughout either. You could have fairly much excised the word zombie from the film and just had a regular killer shark film.
Zombie Shark is a strictly average entry in the gonzo killer shark fad. The effects are nothing great, which is standard for all the abovementioned gonzo killer shark films. The cast are all unknowns with the exception of Jason London. Director Misty Talley doesnt plant her tongue in cheek as absurdly as the Sharknado series but does so sufficiently to make the effort entertaining enough to overcome many shortcomings. There are various entertainingly absurd scenes with shark heads flying through the air to land on people, sharks jumping out of the water to gash Jason London with their fins as he passes and so on. And the odd amusing line like: Why do those people keep coming to the water? Theyre setting up a zombie shark buffet.
Zombie Shark was the directorial debut of Misty Talley who had previously worked as an editor for the low-budget production company Active Entertainment. She subsequently went on to make Ozark Sharks (2016) and Mississippi River Sharks (2017), also for Active Entertainment.