Piranhas
Piranhas are among the most abused of all aquarium fish. They are often purchased in order to watch their legendary feeding habits. As mentioned above, feeder fish often bring diseases and parasites with them and these can infect Piranhas. A regular diet of feeder fish can also be quite expensive.
Piranhas are
schooling fish and are generally shy and stressed when kept as single specimens. Unfortunately, they also get big (many species well over a foot long), so most beginning aquarists donīt have room to house more than a single
Piranha. If enough tank space is available to keep several Piranhas together, they must be kept well fed or they will turn on each other, killing and cannibalizing one fish after another.
