Six-line fish

Six-line fish commonly known as yellow stick. For coastal shallow sea settlement fish, meat and taste especially such as grouper, so called "northern grouper." It has strong adaptability to low temperature, short food chain, fast growth, tender meat, high economic value and can be listed as an ideal species for cage culture in northern China. The six-line fish is oval in shape and flat on the side. The head is nearly conical, the mouth is slightly smaller, the upper and lower jaws have medium-sized conical teeth, and the outer teeth are larger. The scales are small, mostly pectinate. There are five lateral lines on each side. The dorsal fin is long, with a deep depression between the fin spine and the soft bar, and a significant brownish black spot behind the upper part of the fin spine. Caudal fin truncated. Body yellow brown, colorful. It is distributed on both sides of the North Pacific Ocean, and China is native to the Yellow Sea and Bohai Sea (Figure 15). The spawning period of six-line fish is from late October to late November along the coast of Shandong Peninsula. It belongs to one-time spawning type, with egg production of 30,000 ~ 20,000 eggs. It belongs to sticky eggs, mostly produced on flat river hedges and pine algae at the bottom of 2~5 meters deep, and a few produced on reefs. The eggs are spherical, 2 - 2.2 mm in diameter, and the oil globules are numerous and vary in size. The hatching time was longer, larvae hatched after 16 days at 13~17℃.