Black Ghost Knifefish (Apteronotus albifrons)
It requires a minimum of a 150 gallon tank with excellent filtration. It is generally timid and reclusive, preferring a fine-gravel-bottom aquarium with plenty of roots and rocks for hiding places, as well as subdued to dark lighting. To better appreciate this fish, many hobbyists will purchase a "ghost tube," a clear plastic tube that facilitates viewing during the day. Once accustomed to its surroundings, the Black Ghost Knifefish can become incredibly tame and trusting to the point of being hand-held. It does well with other, larger species of a peaceful nature, but may be aggressive towards those of similar or smaller size.
Carnivorous, the Black Ghost Knifefish will eat all types of live foods including meat, chopped earthworms, as well as frozen and flaked foods.