Wild fishBlack Pearl gill, native to Argentina in South America, is about 5 cm long. The biggest feature is that the whole body is black, but also distributed with blue stars, as well as blue stripes. There has been a high popularity in the gill market, and it is not very difficult to obtain this kind of gill. But the difficulty of feeding and reproduction is relatively moderate and not particularly simple. It belongs to one-year-old gill fish, and its eggs are dormant for 3 months after spawning.