Cutlass

1 species of

species



the




. Also known as knife fish, white belt fish, tooth belt fish. The body length is banded and the end of the tail is thin whip. The head is 2 times

head


body. The eye interval is flat. With a large

,


the jaw is longer than the upper jaw. Teeth developed and sharp, the hook-shaped canine teeth at the front of the upper jaw can be embedded in the jaw nest when closed, the front of the jaw canine teeth 2against ,exposed when closed, the upper and lower jaws on each side of the sharp teeth column. The sideline is complete and curves toward the abdomen at the pectoral fin. The dorsal fins are very long, and the butt fins are only slightly exposed to the skin. It is widely found in the warm sea areas of the Indian and Western Pacific Oceans. China has all the sea areas.





Perched on the sea floor of the offshore mud. In the depth of

60




100


100 meters winter. Swim to shallow areas or near shores when laying eggs. In addition to horizontal movement, there is a significant vertical movement habit of day and night. For ferocious carnivorous fish, intense feeding is performed almost all the time except for spawning and low winter intake. The spawning field is very wide, the spawning period is also very long, but with 4 to 6is the peak period, followed by 9 to 11


. Spawning temperature

17




23


degrees Celsius. Eggs are separated floating eggs

,


in the upper layers of water. Egg diameter is about 1.4to 2.2mm, oil ball one, The oil ball diameter is 0.4


to 0.5


mm; At

temperature


degrees Celsius, the incubation time is about 3.5


days. The total length of the first hatching

about


millimeters.






fish grow rapidly

, 1 years old fish average length 180 190 mm

,




90


to 110




,


can achieve sexual maturity.

2


length

280


to

290




,




300 grams, the largest individual anus up to 500 mm

,


age is

8


age.






fish in the south have two wintering farms in the north and south. Fish from the northern wintering ground migrated from the wintering ground to the western coast in early 4, and 6 arrived at The Pishan and Da Chen near-shore spawning , after spawning scattered in the nearby sea area.

12


in the reef, Lushan area formed a dense fish group, and then swam to the northeast to reach the winter field. It ranks first among marine fish. With fish fresh, fresh, marinated, canned goods for sale. Iridescular cells with fish skin can be used as silver coatings for ornaments and a variety of pharmaceutical raw materials. China is one of the four sea fish, with an annual

of million tons, ranking first among the country's sea fish.