Earth-eating snapper is not a single fish species ~ most of these fish come from South America and Central America, and they are collectively called "Earth-eating snapper" because they have the habit of eating mud and then spitting it out (in order to eat the organic matter in the mud). The temperature in the natural waters where they are located is between 20 and 28 degrees; The PH value is about 6.0 ~ 7.0; Medium hardness (8- 13 dGH). In Tabahus River, this fish can grow to 25 cm long. At present, most of the fish seen in China are artificially propagated, but there are few wild species. Omnivorous fish are slender and gentle, with several horizontal lines and a vertical line. The head of the male fish has a convex head, which is full of liquid and the surface is convex and smooth. This bulge starts from the dorsal fin.