Swordfish (marine fish of Perciformes, teleost)?
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Swordfish (scientific name: swordfish), also known as "swordfish". It is a common fish in tropical and subtropical waters of the world, and it is named because the upper jaw extends forward like a sword. [1] 1967 A "speed comparison table of animals in the ocean" published by the Soviet journal Nature shows that swordfish has the fastest swimming speed, which can reach 130 km per hour. [ 1]?
Swordfish has a typical streamlined body with a smooth surface, a long and sharp upper jaw, a small fin on the back, a flat mouth and no gills and ventral fins. Swordfish have different colors. Generally, the back and body of the fish are brown and black. The average weight of swordfish is 68- 1 13kg, and the average body length is 2. 1m, accounting for 1/3 of its body length. The main food of swordfish is other fish and squid. Swordfish is distributed in all oceans except the Arctic Ocean, and it is also a major food fish with important fishery value. [2]? [ 1]?
When swordfish swims forward, the powerful tail handle can produce great impetus, and the jaw like a spear plays the role of splitting water. Swordfish moves at a high speed of 130 km per hour, and its hard upper jaw can pierce the thick layer of the bottom of the ship. In the London Museum, there is a wooden boat with a thickness of 50 cm pierced by the swordfish "long sword". [ 1]?