We've Seen This Movie

Scientists were trying to get sturgeons to reproduce without the need for males. (Why? More caviar?)

They decided the best way to do this was to artificially inseminate them with sperm from a very unrelated species.

Guys.

Species is an arbitrary term.

Now they have hundreds of sturgeon/paddlefish hybrids that they have to do something with. (Coming to a zoo near you, perhaps?)

So, when they escape and start eating people...