Six-line fish commonly known as yellow sticks. As a group of settled fishes in the shallow seas along the coast, meat quality and taste are similar to grouper, so it is called "northern grouper." Its adaptability to low temperature, short food chain, fast growth, tender meat, high economic value, can be listed live fish, is the ideal type of cage farming in the north. The six-line fish is long oval and flat. The head is nearly conical, the mouth is slightly smaller, and the upper and lower jaws have medium-sized conical teeth, and the outer teeth are larger. Small scales, most of the scales. There are 5 side lines on each side. The dorsal fin is long and there is a deep depression between the fin spine and the soft bar. There is a significant large brownish black spot behind the fin spine. Caudal fin truncate. Brown and colorful. Located on both sides of the North Pacific Ocean, China produces in the Yellow Sea and the Bohai Sea (Figure 15). On the coast of Shandong Peninsula, the spawning period of the six-line fish is from late October to late November. It is a one-time spawning type and has a spawning amount of 0.3 to 20,000 eggs. It is a viscous egg. It is produced on the seabed and on the pine and seaweed, and is produced on reefs. Eggs are spherical in shape and have a diameter of 2 to 2.2 mm. There are many oil balls and they vary in size. The incubation time is longer. At 13-17°C, larvae are hatched after 16 days.
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