California bass is a carnivorous fish, so it is necessary to keep the specifications of the same batch of fry neat during the breeding process, otherwise it will be easy to eat each other. In addition, the difference of fry specifications is too great, which will affect the later reproduction and even fail to reproduce. Therefore, understanding and familiarity with the specifications of fry is the basis of fish farming. Let's introduce the specifications of California bass fry. Fish flower fish flower, also known as "splash", refers to the fry hatched from fish eggs, with a length of 7-8 mm. In some areas, it directly refers to the length of fry from hatching to 1 inch (3.33 cm). South China and Southwest China are commonly known as "yolk seedlings", and East China is also called "Russian hair". Seedling and old fry are divided into tender fry and old fry. The tender seedlings are transparent with less pigment, the swim bladder (waist point) does not appear, and the caudal fin and dorsal fin are not separated; Old mouth seedlings are rich in pigments and swim horizontally in water.

After feeding black sesame seeds for 10- 15 days, young fish with a body length of 1.5-2.0 cm were cultivated in Huashui, which were called "black eggs" and "black sesame seeds". Summer flowers (cm seedlings) are fed with 10- 15 days to develop young fish with a body length of 3-5 cm. Because it is in summer, it is called "summer flowers". In some places, young fish with a body length of about 3 cm after 20-30 days are directly called "summer flowers", while in some areas of Guangdong, they are also called "fire slices" and "inch slices". Selecting seedlings before releasing seedlings is a link that farmers need to attach great importance to. The quality of fry is related to its survival rate, growth rate and disease resistance. High-quality fry has high survival rate, fast growth rate and strong disease resistance, while inferior fry is the opposite.

Farmers may be worried when they buy fry. What is good speculation? Most of the fry sold in the market are artificially propagated. Due to the influence of egg quality and hatching environment, the fry's physique is different, which directly affects the later survival and growth. Mastering the level of seedling entry is one of the key steps to raise fish well. Detailed specifications of California bass fry, how to judge whether California bass fry is excellent or not? Observation appearance: high-quality California bass fry, neat specifications, consistent body color, clean and shiny fish body, slightly yellow or slightly red, strong, smooth and not muddy; Inferior seedlings, with different specifications and different pigments, are "color seedlings", thin and muddy.

High-quality California bass fry, active in action, swimming in groups, quickly diving into the water after being frightened, not often staying on the water surface, and having strong ability to grab food; The quality of seedlings is poor, moving slowly, not clustering, roaming on the water, and the ability to grab food is weak. Mouth blowing observation: put California perch into the basin, blow the water with your mouth properly, and the high-quality fry can swim against the current; Inferior seedlings, drifting with the tide, can't hold water. Water pouring observation: high-quality California bass fry, scoop the fry into the basin, slowly pour the water, and the high-quality fry struggle violently underwater, with its head and tail bent into a circle; Inferior seedlings, drilled in the bottom of the basin, are unable to struggle, only the head and tail can twist slightly. Vortex observation: high-quality California bass fry, stir the container with hands or wooden sticks to make the water swirl, and the high-quality fry can swim against the current along the edge; Inferior seedlings, caught in a whirlpool, can't swim backwards.