骨咽魚科屬於鯡形目動物，廣泛分布在南美洲，澳洲和東南亞熱帶和亞熱帶地區，龍魚屬硬骨魚綱、輻鰭亞綱、真骨下綱、骨舌魚目、骨舌魚科，原產地稱之為Arowana，是西班牙語“長舌”的意思。
簡介,
簡介
cheapest and not a protected species . Silver Arowana have long fin and tail with its whole body silver in color . It can grow up to a very large size about 49 inches !
-Black Arowana- is the same as Silver Arowana but its fin and tail are black-color . It is not a protected species but slightly more expensive than a Silver Arowana . Black Arowana are harder to raise than Silver Arowana .
-African Arowana - originated from Africa and unlike other Arowana . Its head are more rounded and not a protected species too .
