Such ecosystems do, in fact, exist in the benthic zones. Edit Details Official Sites: I also had a good time watching the film, I was really happy how the Piranhas looked. Piranha 3-D lived up to its title, featuring Killer Piranhas with 3-D. As the underground lake was sealed from sunlight, one possibility is an ecosystem based on geothermal energy. Find out if your favorite shows are coming back next seasoncheck out what's premiering this falland more in our Fall TV Guide.
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Alternate Versions Also released in a 2D version. However, they could conceivably have survived if some source of energy was available to fuel the bottom of the food chain. Don't go in expecting a masterpiece like Citizen Kane or Schindler's List, cause you'll definitely be disappointed, but with a movie title like this, who would? Is "Piranha 3D" based on a book? Edit Cast Cast overview, first billed only: So, in theory, at least, the piranhas could have sustained themselves as top predator of a food chain that started with geothermal micro-organisms. Oh boy, that's a fast fish.