Protozoal diseases of lionfish
Pathogen: saltwater small melon worm, the body is spherical or oval, similar to many small melon insects, the size of 0.066-0.45 × 0.034-0.36mm, the whole body is covered with cilia, there are generally four beads nucleus accumbens.
Prevalence: adult watermelon insects are mainly parasitic on the gills, skin and fins of marine fishes, and are popular in coastal areas from mid-May to August every year. Saltwater melons are suitable for reproduction at a temperature of 20-25 ℃, and their cysts and larvae spread.
Symptoms: first of all, there are a large number of small white spots on the body surface, and in serious cases, the fish body is covered with a layer of white film, which will cause intermittent bacterial infection due to the destruction of the worm body, resulting in inflammation and necrosis of the fish body epidermis, easy shedding of scales, decay and splitting of the fins, parasitic Gill, destruction of the Gill, infection with bacteria, it will cause rotten Gill phenomenon. When the worm invades the cornea of the fish, it will cause inflammation, blindness, loss of appetite, thin body and swimming disorder. The worm body can be observed and judged by microscope.
Control methods: 1, the density should not be too dense; 2, soak the diseased fish with 0.4-1ppm malachite green for 5-10 minutes and take another bath every other day; 3. 60ppln formalin for 15-20 minutes, sprinkle the water grass tank for 20-30ppm whole pool, 4. Make 50ppm with fresh water and soak for 5 minutes.
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Processing technology of large silverfish (2)
Second, the processing of light dry products of large silverfish is simple and convenient for storage, and this processing is more popular among consumers than dried salt products because it can preserve the inherent flavor of silverfish. 1. Processing process raw material → cleaning → alum water soaking → secondary drying → stacking cooling → packaging → preservation 2. Main points of operation (1) Raw material treatment: first, remove miscellaneous fish, shrimp and other impurities, pour the silverfish into a wooden bucket filled with half a bucket of water in advance, and add food.
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Fried golden barn fish
Materials: a golden barn fish, salt right amount. Cooking: 1, wash the golden barn fish, cut horizontally into 6 to 8 pieces, marinate the fish with appropriate amount of salt for 30 minutes according to your taste, and then dry the surface of the fish; 2, put 3 tablespoons of oil in a pan, heat it over high heat, explode the surface of the fish until golden brown, turn to low heat and fry slowly for 5 minutes to a cooked plate; 3, dip in light soy sauce or vinegar according to your taste. Features: fish crisp on the outside and tender on the inside.
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