Tiffany creates piranhas large enough to eat a battleship. The fish never stop growing and never stop eating, despite the fact that they don’t need to eat to grow and were meant to grow to eat.
If what I just wrote doesn’t make any sense to you, then I have successfully captured the spirit of this film.
Before long, the school of rapidly growing piranhas reaches a major harbor along the river. The carnage is horrific. Not because, as you might suspect, the fish eat everything and everybody in the water. The Mega Piranhas have a startling tendency to leap out of the water at buildings. Upon crashing into a building, a fish then explodes.
Exactly why the piranhas jump into the buildings is never explained. Maybe they are attacking their own reflection, which is odd behavior for animals that travel in schools, or perhaps they are just trying to steal Wi-Fi.
A Hyundai can outrun a Blackhawk helicopter.