There are many fish with sharp mouths, such as swordfish, needlefish and sturgeon. Among them, swordfish is a marine fish, and its upper jaw protrudes like a sword, which allows them to attack the surrounding fish when swimming in the water, so that they can prey. Needlefish's body is cylindrical, generally lives in the upper layer of water, and mostly feeds on zooplankton. Sturgeon, on the other hand, is a kind of benthic fish, which usually feeds on the residues of animals and plants.
Sturgeon: Sturgeon is one of the earliest vertebrate bai in existence. Acipenser sturgeon belongs to teleost, Actinidia, Chondroscleroderma, Acipenseriformes. Zhi, the sturgeon we usually say refers to sturgeon-shaped fish. It is one of the most primitive fish groups.
Needlefish: There are two kinds of needlefish. Round-jawed needlefish with tail spots and round-jawed needlefish with black back. The body of the needlefish is long and cylindrical, slightly flat on the side. The lateral line does not form a bulge at the tail handle. Lateral line scales142 ~157. Dorsal fin12 ~15, anal fin15 ~18; The caudal fin has a round trailing edge and a black spot at the base. Warm pelagic fish. The body length is generally 200 ~ 450 mm. It likes to live in the inner bay or near the estuary of the sea, and it is a smaller one among the jaw needle fish.
Swordfish: Swordfish, also known as "swordfish". It is a common fish in tropical and subtropical seas in the world, and it is named because its upper jaw extends forward like a sword. 1967 A "Comparison Table of the Speed of Animals in the Sea" published in the journal Nature of the Soviet Union shows that swordfish has the fastest swimming speed, with a speed of 130 km per hour.