The great white shark, also known as the man eating shark, is a fish species in the family Muridae of the order Muriformes. The body is spindle shaped; The tail handle is flat and has a protrusion on one side; Each of the upper and lower parts of the tail base has a depression; Blunt and pointed kisses, relatively short; No blinking membrane in the eyes; The nostrils are close to the mouth; The mouth is longer than the kiss in front of the mouth; Short lip folds; Teeth large, triangular, with fine serrations on the edges; 5 gill pores; The first dorsal fin is tall and triangular in shape; The second dorsal fin is very small; The caudal fin is forked, wide and short; The anal fin is the same shape and size as the second dorsal fin, located below and behind the second dorsal fin; The pelvic fins are located approximately below the center of the gap between the two dorsal fins; The pectoral fins are sickle shaped. The dorsal side is greenish brown or dark brown, while the lower and ventral sides are light gray to white.

The Sparidae family refers to the phylum Chordata, suborder Vertebrates, order Perciformes, suborder Percoidei, and order Perciformes. The appearance of undergraduate fish is similar to that of the family Cichlidae or the family Percoidei, but the body size of the snapper is higher and more flattened; The incisors, canine teeth, and molars on both sides of the upper and lower jaws are relatively developed. The body is elliptical or oval in shape, with a large head and a higher front half. The back edge is curved, and the abdominal edge is relatively flat. As an important economic fish species along the coast of our country, it belongs to advanced edible fish. Likes to forage in small groups. Omnivorous, mainly feeding on benthic crustaceans, mollusks, echinoderms, or seaweed, occasionally preying on small fish. Androgynous and capable of sexual transformation.

The barracuda is a fish species belonging to the family Scorpaenidae in the order Perciformes, suborder Scombroidei. Also known as Barracuda or Sparrow Brocade, it is a species of ray finned fish in the family of Barracuda, belonging to the genus Gobiidae. The body is elongated, with a pointed front end and a slightly flattened rear end. Belonging to a global fish species, it is distributed in various sea areas around the world. So far, 20 species of barracuda have been discovered, and barracuda in different seas have completely different behavior patterns. However, their "solitary" behavior is a common feature, and adult barracuda have almost no natural enemies. Juvenile fish feed on planktonic animals, while adult fish feed on diatoms and small organisms. Usually inhabits the sea

Mi fish is a fish species belonging to the family Myichthyidae in the order Perciformes, also known as Miichthys, Mytilys, Hairy Fish, Life Fish, Catfish, or Miichthys. Rice fish are mainly distributed along the coasts of China, Japan, and the Korean Peninsula in the northwest Pacific Ocean. Produced in all coastal areas of China. Coastal warm temperate middle and lower level fish prefer to inhabit sandy and muddy sea areas at depths of 15-70 meters, especially in waters with high turbidity. Fierce in nature, mainly feeds on small fish, shrimp, shrimp, and small benthic invertebrates.

Carangidae is a general term for fish in the family Carangidae of the order Perciformes in the class Perciformes. Important warm water and warm temperate marine economic fish species in the world. Carangi are mainly distributed in tropical and subtropical waters of the Indian Ocean, Pacific Ocean, and Atlantic Ocean, and can also reach higher latitude sea areas with warm currents. Carangi is a family of fish, with a flattened and tall body, thin scales, and a small tail stalk. Abundant in subtropical oceans, with a wide variety of species. The body is elongated and laterally flattened, with various shapes including spindle shaped, elliptical, oval shaped, or diamond shaped.

The medaka is one of the more popular pet fish. In recent decades, it has been widely used in the fields of developmental biology, molecular biology and toxicology. It is one of the organisms to study the proliferation of vertebrate germ cells, genetic mutations, diseases and toxic effects of pollutants.

Sharks, which live in the ocean, are fish in the ocean. Sharks existed on Earth 0.3 billion years before dinosaurs appeared, and they have been around for more than 0.5 billion years now, and they have hardly changed in nearly 0.1 billion years. Sharks, known as sharks, sharks and sandfish in ancient times, are behemoths in the ocean, so they are called "wolves in the sea".