as requested by a student.
as you can see, it does look like a knife. this fish is totally black except for 2 small white spots at the tail. when its a baby, it can be 1 inch long, and can grow to a max of 20 inches. thats 50 cm. interestingly, it is a scaleless fish.
it is actually a tropical freshwater fish, so ppl do tend to grow it in aquariums. but it can naturally be found in fast flowing streams as well.
these fish are moonlighters. so you’d think its called a ghost cos it usually comes out at night? nope. apparently, the natives (Amazonians) believe that the ghosts of their dead relatives live in these fish.
nocturnal creatures. that also means that they function somewhat like deep sea creatures. they dont have much use of their eyes.
so guess what, like sharks, they use electric sensors. these sensors are found near their nose. these sensors send out electric current so small, that it is not felt by most other fish. it doesnt electricute the fish, but it does tell the black ghost that there’s prey around. the other fishes end up dying anyways. or at least the small ones.
if you intend to grow black ghosts (fondly called), your aquarium must have sand gravel as its base. optimal pH at 6-7.
since it’s nocturnal, it doesnt like daylight. so you must also provide hiding places for it. that includes caves, tubes and plants. in the day, you’ll probably find it lying on its side, its sleeping.
since it eats small fish, you cannot have small tetras or neons in your black ghost tank. the small ones wont survive. other than that, black ghosts have been noted to be rather friendly, eating out of ppl’s hands. other food include carnivorous pellets and bloodworms.
apparently, this fish exhibits interesting habits. they can swim backwards as well as upside down. they like to come up to the surface. they can be hand tamed.
seems like a fun species. some warn that you can only keep one per tank, some have said that 2 is fine. test it out. sounds like fun. just make sure you buy a large enough tank…