Sailfish is a fish species belonging to the family Sailfish in the suborder Scombroidei, also known as flatsail, swordfish, or swordfish. The upper jaw of the mouth is like a sharp long sword, very prominent. The first dorsal fin with black spots on the back exceeds the body height, and the middle part is about twice the height of the fish, like a floating flag, so people call it a sailfish. Sailfish are widely distributed in the Atlantic, Indian, and Pacific oceans, as well as in the South China Sea and southern East China Sea, and are active in tropical and subtropical regions. Fierce carnivorous fish with extremely strong attacking power. Sailfish is the fastest swimming fish in the world, with a speed of up to 110 kilometers per hour. Its streamlined body is very suitable for swimming.