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Biological characteristics
(1) Morphological characteristics. The morphological characteristics of American redfish are basically the same as those of the pseudo-gray fish. The typical characteristic is that there is a very prominent red spot or red above the milky abdomen; the tail of the juvenile has a large black spot at the base of the tail and is 10 cm long. The left and right juveniles also had large dark spots on the body side and on the back, but they mostly disappeared when they were about 15 cm long. The body is longer in shape and the head is blunt.
(2) Living habits. The optimum temperature range for red growth in the United States is 8 to 35°C, and the optimum temperature is 16 to 30°C. The salinity adaptation range is 0 to 4%, and the optimum is 0.1% to 3%. A suitable pH range is 6-9, most preferably 7-8. The requirement for the dissolved oxygen in water is 2 mg/l or more, and the optimum is 6 to 9 mg/l.
The distribution of redfish in the United States, juveniles like coastal waters, there are more coastal water areas and there are more algae in the bottom distribution, distribution in the open bay area is very small, most of the redfish in the United States at night, and very alert.
(3) food habits. The juvenile American redfish mainly feeds on zooplankton, feeds animal feed during the adult stage, and feeds granular feed well under artificial culture conditions.
(4) Breeding habits. The natural reproduction temperature of American redfish is about 25°C, the sexual maturity age is 3-6 years, and certain light is needed during spawning. Males usually chase females before they spawn, and they vocalize. Males and females then rub against each other and push each other, spawning soon. Normal fertilized eggs can rupture within 18 to 25 hours. The length of incubation depends on the water temperature. The newly hatched larvae floated on the surface of the water and ate for food 2 to 3 days later.
The biological characteristics of American redfish
American redfish The scientific name of redfish is Red Dendrobium, which belongs to the order of the suborders of the Asiana, the Shrike, and the genus. The coast of Massachusetts originates from the Atlantic Ocean in central Mexico to the United States.