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.

It is a mammal of the platypus genus in the platypus family. The platypus is named after its snout that resembles a duck's beak. It is a mammal of the platypus genus in the platypus family. The platypus is named after its snout that resembles a duck's beak. It is a mammal of the platypus genus in the platypus family. The platypus is named after its snout that resembles a duck's beak. Mainly foraging underwater, preying on invertebrates such as worms, insect larvae, freshwater shrimp, and crayfish. The platypus holds an important position in Australian culture and often appears in mythological stories, songs, poems, or stamps. At the beginning of the 20th century, humans were still hunting platypus for fur. Except for the extinction of populations in southern Australia, platypus were still common in their distribution areas