Lateolabrax japonicus, also known as Lateolabrax japonicus, Lateolabrax japonicus, Lateolabrax japonicus, Lateolabrax japonicus, Lateolabrax japonicus, Lateolabrax japonicus, commonly known as Lateolabrax japonicus, is listed as one of the "Four Famous Freshwater Fish in China" along with Cyprinus carpio, Siniperca chuatsi and the big white fish in Xingkai Lake, Heilongjiang Province. The species of perch in China is mainly Songjiang perch, also known as four-cheeked perch, also known as tiger head fish. ?

Introduction of black bass

The body is long, the front part is flat and flat, thick, sub-cylindrical, and gradually flat and fine; The dorsal and ventral edges are shallow arcs; The dorsal and ventral edges are shallow arcs, the first half of the trunk is slightly higher, and the body is the highest at the base of the ventral fin.

The tail handle is low and long. The head is broad, flat and flat, with a shallow arc at the back edge, intersecting the upper jaw at about 25 degrees, and the ventral edge of the head is shallow and oblique. The kiss is wide and round, and the length of the kiss is about 2 times of the eye diameter.

Two nostrils. The eye is small, round, in the upper position, slightly less than 2 times from the posterior edge of branchial lid bone to the snout. Wide mouth, end position, low inclination of mouth crack. Lip hypertrophy. The maxilla is slightly longer than the mandible, and the maxilla is exposed.

The posterior end is blunt and extends below the posterior edge of the pupil. The maxilla, mandible, vomer and palate all have villous teeth. The tongue is broad, round and slightly free at the front end. The gill holes are wide.

There is no hole behind the fourth branchial arch. The operculum is connected with the isthmus. Gill cover strip 6. Gill harrow is short and granular. Pseudogills are well developed. Nasal spine 1 piece, blunt tip.

The anteroposterior process of kissing back is tall. The gill cover bone has 1 low edge and the end is flat and blunt. There are no spines in the lower branchial operculum and the intermebranchial operculum. There is no brachial spine above the base of pectoral fin. The interocular septum is concave. Both the anterior nostril and the posterior nostril have short tubular skin processes. There are no depressions or flaps in other parts.