A good title for a sequel or even a seprate movie would be

Boacuda (Half Boa, Half Barracuda)

I had the idea and started writing a script

The idea would be

A plant that has just been discovered will be sold on the internet for $5 bucks becuase everyone thinks it's worthless. that is until a rich family buys it.

a few days after it is planted the husband of the rich family catches a mutated barracuda (that has just escaped from an aquarium. so he brings it home and after some testing (since the husband is a scientist) he decides there is nothing wrong with it, and being the lazy rich person he is he chops it up and uses it as fertalizer for the rare plant. That very same night however his daughter's boa constrictor escapes from its tank and proceedes to eat the barracuda peices. Then the rare plant lets of a smell that attracts reptiles, the boa eats it and then the next night, after everyone is settled in the daughter notices that her pet has escaped. Then she hears screaming and glass breaking from inside. She rushes to see but her father grabs her and takes her and her brother to the basement. They think they are safe until the (now combined, and 60 feet) boacuda breaks down the door and kills her younger brother and father while she escapes through a window in the basement. She runs away and tries to warn people but she can't seem to get a head start and the boacuda (now recking her home town) is devouring everybody she tries to warn...

That is as far as i got... what do ya think? :)