How to keep freshwater jellyfish (Craspedacusta)? Are they poisonous? Explained clearly in one article
SummaryEnvironment: Add seawater to the aquarium; for natural seawater, a jellyfish protectant needs to be added, and it should be left to settle for about 24 hours before use. For artificial seawater, add artificial sea salt to purified water at a ratio of 1:0.032; seawater salinity is generally 3.5%. Management: Starting from the 2nd day after entering the tank, feed once a day. You can use brine shrimp nauplii or special liquid food for jellyfish. When feeding, turn off the water pump (circulation system). In summer, change the water once a week; in winter, change it once every 2 weeks.
The freshwater jellyfish (Craspedacusta) is a type of jellyfish and is currently distributed in many places around the world. We all know that being stung by a jellyfish causes a lot of harm, so are freshwater jellyfish also poisonous? If we want to keep freshwater jellyfish, what exactly are the specific breeding techniques? Let's take a look below!
How to keep freshwater jellyfish
1. After installing the freshwater jellyfish tank according to the instructions and soaking the tank, add seawater. For natural seawater, a jellyfish protectant needs to be added, and it needs to be left to settle for about 24 hours before use. For artificial seawater, add artificial sea salt to purified water at a ratio of 1:0.032 (do not add table salt); seawater salinity is generally 3.5%.
2. After adding seawater and running the jellyfish tank for 24 hours, put the jellyfish into the tank. First carry out temperature acclimation for 10 minutes, then carry out water acclimation three times, and then pour the jellyfish into the jellyfish tank (be careful not to let the jellyfish be exposed to the air).
3. Next comes the daily care of freshwater jellyfish. Do not feed the moon jellyfish on the first day after entering the tank; start feeding once a day from the second day. When feeding, you can use brine shrimp nauplii or special liquid food for jellyfish. Each time, feed each jellyfish 1/3 teaspoon of brine shrimp nauplii hatched from shrimp eggs or 2 drops of liquid food. When feeding, turn off the water pump (circulation system) to make it easier for the jellyfish to eat. After feeding, promptly clean up the remaining food to avoid deterioration of water quality. (For hatching brine shrimp, see the corresponding entry in Baidu Experience.) When the gastric cavity of the freshwater jellyfish turns orange-red, it means the jellyfish is already full. Do not overfeed, to avoid killing the jellyfish by overeating.
4. Freshwater jellyfish do not like water changes that are too frequent. When changing water for jellyfish, follow the principle of small amounts and few times. In summer, change the water once a week; in winter, change it once every two weeks. Each water change only needs to replace 1/10 of the total water volume, and the water and salinity must be the same as the original water. The removed water can be used for hatching brine shrimp.
Are freshwater jellyfish poisonous
Freshwater jellyfish are somewhat poisonous. If you do not touch the tentacle parts of the jellyfish, there is no problem. The tentacles of freshwater jellyfish have some stinging cells. Once stimulated, the jellyfish will release stinging cells to attack, and the stinging cells all carry toxins. Do not grab them with your hands after seeing them. If the area that touched the freshwater jellyfish swells, you can apply ice, or apply some swelling-reducing medicine. If it is serious, you should go to the hospital for treatment.
What food do freshwater jellyfish eat
The freshwater jellyfish is a primitive and lower invertebrate. It relies on the continuous contraction and relaxation of its bell to press the water in the subumbrellar cavity out of the body, thereby slowly swimming in the opposite direction. It mostly feeds on cyclops, small nematodes, small annelids, small tadpoles, small fish fry, and so on. When it encounters food, the nematocysts on its tentacles shoot out threads, stab the captured prey, quickly causing it to be poisoned and die, and send it into the mouth with the tentacles, swallowing it into the gastric cavity.
Distribution of freshwater jellyfish
1. Worldwide: Freshwater jellyfish are distributed in Japan, South Korea, the Philippines, Russia, the United Kingdom, France, Germany, Italy, Belgium, Sweden, the Netherlands, Spain, Poland, the Czech Republic, Australia, the United States, Canada, Panama, and other places.
2. Domestic: In China, freshwater jellyfish are distributed in Sichuan (Chengdu, Dujiangyan City, Panzhihua, Luzhou City), Zhejiang, Hubei, Jiangxi (Nanchang), Hunan (Changsha), Xiamen, Henan (Xinyang), Northeast China (Songhua River basin), Taiwan, China, Hong Kong, China, and other places.
The breeding method for freshwater jellyfish is actually not difficult. When breeding them, you must manage temperature, feeding, and other aspects well. Only by doing these well can you ensure their healthy growth. Freshwater jellyfish like to eat foods such as small tadpoles and small fish fry, so when feeding, you need to pay extra attention.