CATDOLL : CATDOLL: What is this red creature in the river and where did it come from?

1. What is this red creature in the river and where did it come from?

This is a fish worm, also known as "water flea", professionally known as cladocerans or copepods. People who love goldfish often feed goldfish with fish worms to make them grow faster and reproduce more. Fish worms are neither fish nor insects. They are a type of zooplankton that lives in fresh water. They often jump in the water, which is very similar to the movement of fleas, so people call them water fleas.

Fish worms like to live in slow-flowing fertile water, and the water depth is generally about 0.5 meters. Every year in late spring and early autumn, it is the season for fish worms to reproduce in large numbers. Fish worms float on the water surface, often making the water surface brown-red, and people can easily find them. In southern my country, fish worms can be collected all year round, and they are easier to collect in spring and autumn.

2. How to raise fish and insects

Cladocera, commonly known as red worms and fish worms, are collectively called water fleas. They are small crustaceans. They are generally 0.2 to 3 mm long. They grow in water bodies such as sewage ponds rich in organic matter. Their protein content accounts for 40 to 60% of their dry weight. They are rich in amino acids, vitamins and calcium necessary for fish, and are the most commonly used ideal bait for young and adult goldfish. When artificially cultivated, a rectangular earthen or cement pool with a depth of 1 m and a moderate area can be built outdoors. First, pour clean water into the pool to a depth of about 50 cm. Add 1.5 to 2.5 kg of pre-fermented compost made of grass, feces, etc. as base fertilizer per cubic meter of water to make algae and bacteria multiply in large quantities. After the pond water is exposed to the sun for 2-3 days, the adult cladocerans can be transplanted as the seed source (the flea species can be collected from the water bodies where the cladocerans are clustered in the morning and evening with a special net for catching red worms). The inoculation amount is about 30-60 g/m3. When the water temperature is 20-25°C, a large number of cladocerans will be multiplied in 3-5 days. After that, topdressing should be done once depending on the water quality. The topdressing amount is 0.2-0.5 kg/m3 of decomposed manure. After 5-7 days, the cladocerans can be scooped to feed the young and adult goldfish. Generally, the scooping should be done every 1-2 days, and 10-30% of the existing cladocerans in the pond should be scooped each time. After scooping, add new water in time. Every 3-7 days, 0.5 kg/m3 of decomposed organic fertilizer should be applied. This is a continuous cultivation and continuous scooping.

3. What kind of fish food is this? Grandpa often uses it to feed fish.

Daphnia, commonly known as fish worms, are small, about 2 mm long, light flesh-red in color, and live in fresh water. Daphnia refers to two major types of aquatic zooplankton, cladocerans and copepods. They are rich in nutrients, easy to digest, and are a palatable bait for fry and fingerlings. Artificial cultivation of Daphnia for feeding fish has low cost, fast fish growth, and good production-increasing effects.

4. There is an animal called fishworm. Is it a worm?

no

Fish worms are also called "water fleas", professionally known as cladocerans or copepods. Fish worms are neither fish nor insects. They are a type of zooplankton that lives in fresh water. They often jump in the water, much like the movements of fleas, so people call them water fleas.