Mapfish is the larger species of tropical fish, up to 30 cm long in captivity, and now there are several different varieties. The map fish is burly, broad and thick, with an oval body, high body and flat side, fan-shaped caudal fin, and a large mouth. map. The large black spots with red and yellow edges appear on the handle of the mature fish tail, which look like eyes, which can be used as a protective color and a lure color, so that the prey can't tell the front and back and can't escape. Because of its dark body color, it is also called black pig fish; at the base of its caudal fin there is also a ring with black in the middle and a golden edge around it, which sparkles when swimming, so it is also called tail star fish.     The dorsal fin of the map fish is very long, from the back of the corresponding part of the pectoral fin to the base of the caudal fin, the front half of the fin rays is composed of short serrated fin spines, and the rear half is composed of longer fin rays Composition; pelvic fin long pointed; caudal fin arcuate. Although the color of map fish is monotonous, its shape is very unique and has unique ornamental value. At the same time, its meat is delicious and has edible value. According to reports, the map fish is very emotional after being raised in captivity. When people approach the aquarium, it will swim over to express their welcome.     There are red map and white map according to body color. The body color of Safflower Map is mainly dark brown, with irregular orange-yellow patches and red stripes on the body surface, and the caudal peduncle has round spots with orange warp edges; the body color of White Map is mainly light yellow, with striking red on the body surface. Patches and streaks.