The Black Ghost Knifefish is an unusual freshwater aquarium fish that originates from South America near the Amazonian Basin. It belongs to the Ghost Knife Fish family and is capable of both producing and sensing electric signals in the water.

They are very popular in the aquarium hobby due to their strange shape and movement. The Black Ghost Knifefish navigates itself by rippling its head to tail underside fin in a constant rhythm. Aside from the two white strings on its tail and a white stripe on its nose, the Black Ghost Knife is jet black without scales. Unknown to most beginner hobbyists the Black Ghost Knife Fish demands a very large aquarium and can continue to grow in size until it reaches its maximum length of 20”. The black ghost knife fish is sensitive to changes in water conditions and is not recommended as a beginner fish. Water stability is key with this species.