It is a large marine fish species belonging to the swordfish family and the swordfish genus, known for its astonishing swimming speed and unique appearance. The body is streamlined, with well-developed muscles and a strong and powerful tail that can swim quickly in water. The most prominent feature is that the front of the dorsal fin is very long, like a flag, which is also the origin of their name. I mainly live in tropical and subtropical waters and enjoy activities in open seas. It is a top predator that feeds on fish, squid, and other marine organisms. Their hunting methods are very unique. They use their ability to swim at high speeds to strike their prey, causing them to faint or die. It is one of the fastest fish species in the ocean.

It is a large fish that lives in the ocean and is known for its fast swimming and jumping abilities. Usually has a slender body and a sharp beak, with body colors ranging from deep blue to silver gray, sometimes with stripes or spots. It is a predator that feeds on small fish, squid, and other marine organisms. Distributed in tropical and subtropical waters around the world, especially in the Atlantic, Indian, and Pacific oceans. It is loved by fishing enthusiasts for its excellent athletic ability and spectacular jumping, and is also an important component of marine ecology. Due to overfishing, some species of marlin are facing survival threats and require protection and proper management.

It is a large marine fish that lives in tropical and subtropical waters, known for its astonishing speed and jumping ability. Having slender bodies and pointed snouts, they are able to quickly navigate through water like arrows. Their bodies are usually dark blue or black with white spots on top, which helps them camouflage in the ocean. It is a top predator that mainly feeds on small fish and squid. When hunting, they will use high-speed sprinting to capture prey, and sometimes even jump out of the water to hit the target with astonishing strength and speed. This hunting method demonstrates the physiological adaptability of swordfish.

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.

Marlin fish is a common name for large marine fish in the family Serranidae of the order Perciformes. The maxilla of this fish family protrudes forward like a spear head, its side beak is blunt and round, its body is covered with small angular scales, and its skin is thick as leather. Widely distributed in the upper waters within 200 meters in tropical and subtropical regions. This fish is native to tropical and temperate waters of the Atlantic, Pacific, and Indian Oceans, and is the most well-known among all fish species. The fish mentioned in Hemingway's "The Old Man and the Sea" is also the largest fish caught by the San Diego Old Man, and is referred to as the marlin in the novel.

It is a species of fish in the family of swordfish and genus of swordfish, commonly known as umbrella swordfish or oriental swordfish. Oceanic mid upper migratory fish are generally found in waters above the thermocline and often appear in groups around islands. Swimming speed is fast. It has the habit of breeding and migrating. Mainly feeds on fish, crustaceans, and cephalopods. Widely distributed in tropical and subtropical waters of the Indian Ocean, Atlantic Ocean, and Pacific Ocean, and can even enter the Mediterranean Sea from the Red Sea. Distributed in the South China Sea, East China Sea, and along the coast of Taiwan, with the highest production in the eastern and southern parts of Taiwan. Flat finned swordfish is an important economic fish species.