3/4 kg is about 1.4 meters long and the belly is about 3 centimeters in diameter.

Fish is the oldest vertebrate. Some hybrid offspring with different chromosome numbers still have fertility. They inhabit almost all aquatic environments on earth, from fresh lakes and rivers to salty seas and oceans.

Fish are divided into two classes: Anjawoidea and Anjawoidea. Anjawoidea includes Cirrhonchus, Armored Fishes, and Anjawoidea includes Shieldfish, Chondrichthyes, and Actinidia. Most fish are temperature-changing vertebrates that live in water all year round, breathe through gills, and use fins to help balance and move. Although most fish are cold-blooded, many sharks and tuna are semi-constant.

Fish is rich in animal protein and phosphorus, which is rich in nutrition and delicious, easily digested and absorbed by human body, and plays an important role in the development of human physical strength and intelligence. Other parts of the fish can be made into cod liver oil, fish glue, fish meal, etc. Some fish, such as goldfish and tropical fish, are colorful and have high ornamental value.

Fish species: bighead carp, herring, horse herring, tilapia, mandarin fish and so on.