The Pufferfish derives its name from its remarkable ability to inflate itself by sucking in air or water. When a Pufferfish feels threatened, it will puff up its elastic stomach until it looks almost spherical. The Pufferfish is therefore also known as Balloonfish, Swellfish, Blowfish and Globefish. The ability to inflate itself is also found in the Porcupinefish, but unlike Pufferfish, the Porcupinefish is equipped with spines.
Colomesus asellus is a freshwater Pufferfish that is popular among aquarists since this freshwater Pufferfish is quite peaceful and can be kept in community aquariums. Despite its peacefulness, Colomesus asellus is however still prone to nip fins, a fact that must be taken into consideration when you choose its companions. Colomesus asellus is found in the Amazon basin in
Tetraodon lineatus is a freshwater Pufferfish native to
Africa and it is commonly known as Nile Puffer, Fahaka, or Banded puffer. It is not commonly kept in aquariums, since it is quite an aggressive species that will be violent towards it own species as well as towards other fish. Keeping your Nile puffer alone is therefore recommended. The fact that this freshwater pufferfish is aggressive does not mean that it is impossible to keep, and successful spawnings do take place even in captivity. The aquarium must be fairly large since the Nile Pufferfish can grow up to 18 inches long (45 centimeters). In captivity, it will however often stay around a more modest 10 inches (25 centimeters). It needs open areas to swim around in and you can feed it live or frozen meaty foods, e.g. earthworms, snails and mussels. The teeth of this fish grow throughout the entire life of the fish, and you must therefore provide your Nile Puffer with hard food, such as shellfish and snails, to keep the teeth at a reasonable size. This freshwater Pufferfish will tolerate soft to medium hard water. The pH should be kept around 7 and the water temperature between 75 and 78o F (24 and 26o C).