Pearl spot is a sea fish, pearl spot's scientific name is pearl gentian grouper, it is a hybrid cultivated by gentian grouper and tiger spot, the head is similar to tiger spot, but the tail is the tail of gentian, so it looks very beautiful. In addition to being an ornamental fish, it is also a very good edible fish skin weight, with fast growth rate, strong resistance to disease and tasty meat, so it has a high economic value. Due to the fast growth rate of pearl gentian, strong disease resistance, quickly occupy 70% of the grouper farming in Hainan, becoming the first species of grouper farming.