The document discusses the piranha species Pygocentrus Nattereri, providing its scientific name, range in South America including the Amazon basin and Venezuela, diet of fish, humans, fruit and vegetables, physical description of looking like a fish with sharp teeth and being small, breeding involving eggs and nests, unique anatomy of regrowing fins and teeth, weird facts of being cannibals that travel in groups of 100 and can detect blood, and a concluding statement thanking the reader for learning something new.
