Pufferfish, _ order, _ family. Also known as bubble fish, it is called _ horseshoe crab (hóu tái) in ancient times, and it is also called _ fish, bubble fish and spicy fish. In Jiangsu and Zhejiang, it is called Xiaoyu Spot, Dayu Spot and Wulang, in Guangdong, it is called adult fish, chicken bubble and turtle, in Chaoshan, Guangdong, it is called strange fish, and in Hebei, it is called pull head.
River _, commonly known as "puffer fish", is the floorboard of bony fishes. River _ body is cylindrical, with air bags, which will inhale and expand when it is in danger. Generally, its body length is 25-35 cm! The maxilla, maxilla and tooth callus are combined into four large dental plates, with dorsal fin 1 and no pelvic fin. Scaleless or spiny.
It is oval, with a blunt front end and a tapered tail. The kiss is short, round and blunt; Small mouth, end position, transverse crack. There are two plate-shaped incisors in the upper and lower jaws, and the middle seam is obvious. The lips are developed, and both ends of the lower lip bend upward on the outer side of the upper lip. Small eyes, small gill holes, an arc crack, located in front of the pectoral fin, densely covered with small thorns.
The dorsal fin is very backward, opposite to the gluteal fin; No ventral fins; The back end of the caudal fin is flat. The back of the body is grayish brown, the side is slightly yellowish brown, and the abdomen is white; The marks on the back and side of the body vary from species to species.