How do jellyfish raise jellyfish? what food do they eat?

Jellyfish are beautiful aquatic creatures in the ocean. They look like a transparent umbrella and are very beautiful. If groups of jellyfish gather together, it must be an amazingly beautiful picture. People who have seen jellyfish may have a question, because they have not seen the "mouth" of jellyfish, they are very curious about what jellyfish usually eat.

How to raise jellyfish

1. Mariculture. Jellyfish are marine life, so they must be farmed with sea water. Change their water every week or so to prevent dirt and microbes from blocking jellyfish and fish from receiving energy and affecting the speed of movement. Be careful not to touch the jellyfish when changing the water. Don't rush and slow down when adding water.

2. Feeding. Jellyfish have high requirements for food, and plankton such as Artemia and harvest shrimp (refer to other experiences for shrimp farming in harvest years) are their favorites. When it is found that the digester and mouth in the jellyfish wings turn orange, it means that the jellyfish is full. The number of times of feeding should be well controlled and should not be too much, as the water quality will easily deteriorate.

3. Light source. Light is an important factor for jellyfish to replenish energy. Some algae in the jellyfish, unicellular Xanthophyta, supply the oxygen produced by their photosynthesis to the jellyfish, while the nitrogenous waste produced by the metabolism of jellyfish happens to be supplied to the unicellular Xanthophyllum in the jellyfish. The relationship between the two is interdependent.

What kind of food do jellyfish eat

1. Jellyfish are carnivores, feeding on plankton, small crustaceans, hairy animals and even small fish. Although they are beautiful and docile, they are actually very ferocious. Once they encounter prey, they never let go easily, but they have no respiratory organs and circulatory system. Only primitive digestive organs, so the captured food is immediately digested and absorbed in the lumen.

2. the digested nutrients rely on the cilia swinging on the wall of the circulation tube to promote the nutrients from the gastric cavity through the radiant tube into the annular tube, and then discharge the undigested food residue out of the body through the positive radiant tube, inter-radial tube, gastric cavity and mouth.

3. Jellyfish feed on plankton in water, but in aquarium fish, they cannot provide water full of plankton and organic matter. So the bait is mainly rich shrimp. Also need to supplement jellyfish liquid feed, sea water trace elements, but also specially for soft seawater rotifer feed.

What are the highly toxic jellyfish

1. Box jellyfish: each tentacle of the box jellyfish has enough toxin to kill 50 people and can stop human cardiopulmonary function within 3 minutes. At least 5567 people have died of this animal since 1884, causing a higher death rate than snakes, sharks and saltwater crocodiles.

2. Monk hat jellyfish: the deadly toxins secreted by the monk hat jellyfish are the tiny stinging cells in the tentacles. Although the toxins secreted by a single stinging cell are negligible, the toxins accumulated by thousands of stinging cells are as intense as any poisonous snakes in the world today.

3. Sand jellyfish: the adult umbrella diameter of sand jellyfish is 25-60 cm, with a maximum of nearly 1 meter. the surface of the outer umbrella is smooth, the glue layer is thick and hard, and its stinging cells are highly poisonous. after being stung, the skin is red and swollen, painful and itchy, severe shock, and even death.

4. Lion bristle jellyfish: lion bristle jellyfish is a kind of creature that can cause death, but it seldom moves where humans go in and out. The stinging cells on the tentacles contain poison needles and sacs containing venom, and the venom enters the human body and quickly paralyzes and dies.

Stung by a jellyfish. Is it poisonous?

Poisoned by jellyfish stings. There are stinging cells on the surface of jellyfish tentacles and perioral tissue, and the stinging cells contain stinging wire sacs that store venom, which can inject venom into human or animal bodies through stinging wire sacs, which produce a variety of biological toxic effects on cardiovascular, blood, nerve, muscle and so on. Jellyfish toxin has lethal activity, hemolytic activity, cardiovascular toxicity, hepatotoxicity, neurotoxicity, enzyme activity and so on. Rash, redness, swelling, pruritus, pain, low blood pressure, even dyspnea, fainting, shock and death can occur after being stung.

There are all kinds of wonders in the world. The beautiful jellyfish are also carnivores. At ordinary times, their main prey are small fish, shrimp and some plankton. Although it looks gentle and beautiful, it always treats its prey with "ruthlessness". As long as it is caught, it will never let go easily.