Indonesia - List of fishes

It owes its name of "freshwater shark" only to the shape of its dorsal fin. It behavior and it food have nothing comparable. It acclimates easily to the aquarium.

It lives in fresh water but also in brackish water. Like most puffer fish species, its flesh and organs are toxic. In captivity, adults can be aggressive towards other fish species.

Much of it body is transparent. In the rainy season, it takes advantage of the floods to exit the riverbed where it lives to breed. It easily accommodates to life in the aquarium. Its flesh is used for the production of a "fish sauce".

It is not an eel, it owes its name to the shape of it body. It is a nocturnal species and during the day it hides in the sand. It is threatened because of overfishing. In captivity, it must be introduced in a large aquarium where there are no small fish.

It can breathe oxygen from the air, it stays at least half an hour under the surface between two breathes. Its tapered pectoral fins have a tactile and sensory role. Because of its large size, it is not recommended for the aquarium of a specimen.