Coming from the director of Beverly Hills Vamp, it's an improvement, but that's only saying so much. There is a good idea here with a mad doctor creating fish hybrid females. I just the drama was mixed in better.
There are seeds of a good concept with the protagonist's girlfriend ending up with the inhabitants and the boyfriend trying to figure out what is going on. The biggest mistake is how it focuses too much on the boyfriend. If more time was devoted to the other characters, I think this would have been a solid B movie. Unfortunately, Piranha Women takes off right when it begins to end. And once it ends, we feel a damp and unsatisfied conclusion. I feel it would have been better to take a cue from Joe Dante's The Howling. A much better movie about a secret society of monsters hiding in a world. This could have reached those heights if only more focus was placed on the other unique elements plugging into it.