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Songjiang perch
Trachidermus fasciatus
Source: Songjiang perch nets
Category
Head: Head shape rockfish (Scorpaeniformes)
Section: suborder sculpin, sculpin Branch (Cottidae) < br> is: Songjiang perch is (Trachidermus)
identification traits
general body width 20 cm and measuring 200 to 350 grams. flat pate and body of the front flat, flat and tapering to the rear. headaches. mouth large maxillary long, the 2 had villous serrated mouth. either sides of the gill membrane of every of two crooked orange stripes, favor four foliage exposed gills. body without scales, peel, or rind fold around the small protrusions. dorsal 2 a, pedestal connected. pectoral fins large, round, flare. ventral thorax. caudal fin slightly rounded posterior margin. body dingy brown, paunch pearly, sides of body with black stripes, black spot aboard the head and dorsal fin.
distribution
anadromous migratory fish because the sea, are distributed forward the coast of China, Songjiang County of Shanghai's most outstanding production, accordingly the name Songjiang perch, May yield extra.
Status
populations in China, There are merely three positions in the delivery of Songjiang perch, of which only the Yalu River (in Liaoning provincial boundaries) of the Songjiang perch considerable digit of category,
other bodies of water, such as the Dragon River (Shandong among provincial boundaries) and the Fuchun River (Zhejiang sector) caught only sporadically.

Endangered Cause of sewage and industrial noxious pesticides, fertilizers, close the mouth of the river pollution is solemn, make this complicated apt access fresh water fish, feeding, fattening and growth. On the additional hand, conversion and build dike fishing, fishing in spring of normal seed (such for fishing crabs,in the system, eel seedlings, etc.) of the dense lace blocking the mouth of the bar,beijing escort, making the migration paths blocked Songjiang perch, can no complete the anadromous migration, resulting in its distribution space in China sharply depressed the number of existing populations and the decline year along annual.
culture
Songjiang gill perch longer than four feet and weighing in kg. the so-called fish and often the same, only with two gills,guangzhou escort, since gill gill prologue in the second 1 was the former have gill-like depression, and the gill openings of alike shape, mocking true gills first and foremost peek, it has forever been faulted for known as the superior Zhenyao. Qing Emperor Kangxi and Qianlong's southern voyage, the prestige of . While the novelist's words are not trustworthy, merely this is also recorded in the lawful history gills, only four gill Songjiang perch, and the monster mouth microlepis, hard spines. the tender and fat,beijing massage, fresh yet not fishy, ​​not nice burr, palatable savor exquisite, the most delicious savage fish is 1. said Show only the northwardly door of Songjiang brutal sea bass beneath the bridge of the best,beijing escort, I nor, and, for the perch of the matherland. show reason why the precious wild sea bass under the bridge, one is tender and palatable; a four gills, is one of the fish must .