Why don t submarines eat fresh shrimp? Why can t shrimp survive in fresh water?

Submarines are pelagic fish that often swim in the upper layers of aquariums.

Submarine fish, due to changes in water quality and environment can not adapt, often do not want to eat, if there is no trauma and bacterial infection, after a few days once they adapt, it is very able to eat. Fish are selective about food, which is related to the food it has been fed since childhood, once it is used to eating certain foods to be replaced, there will often be refusal to eat, you feed small shrimp do not eat, but have been changed to other foods, such as blood worms, frozen shrimp try, may accept. In addition, there is no need to be anxious now, as long as the maintenance conditions meet the requirements and the water quality is controlled, it will be temporarily left to it, rest assured, you will not die of hunger for a few days, and you will start to eat when you are hungry.

The submarine fish is actually a type of puffer fish, which is more aggressive. When raising puffer fish as an ornamental fish, you should be especially careful, and when you have a wound on your hand, do not directly contact the fish, and do not accidentally injure other animals or people.

If the belly of the submarine green puffer fish is black, let the baby puffer fish swim in the tank The belly will turn white, the back will be black, and it may be sleeping, so don't worry about this. If the puffer fish doesn't eat it, then feed it frozen fresh dried shrimp, and you will find that the puffer fish will be full immediately. In this way, basically your small river village will adapt to the environment in the tank, and you will also add coarse salt or seawater salt to the small puffer fish tank regularly for one to three days.

Try to dim the lights in the tank as much as possible, and the water temperature is 21° to 25°. Be sure to buy a filter for the pufferfish, and if you don't have one at home, change the water every three to five days, and buy a heating rod. Follow my method, your baby puffer fish will last a long time.

Because shrimp can only adapt to survive in seawater, they will die in fresh water. Oxygenation also doesn't work.

Shrimp live in shallow seas with muddy and sandy bottoms, and are very active during the day, often lurking in the mud, and are very active at night, swimming to the upper and middle layers of the sea from time to time to prey on other small zooplankton. It is distributed in the Yellow Sea, the Bohai Sea and the sea areas north of the Yangtze River estuary, and is a specialty of China.

Lobsters are larger than prawns, more than 30 cm long, and bright in color. The cephalothorax is harder and more abundant, the antennae are extremely developed, the second pair is longer and larger, the base is thick and spiny, and the tail is very large. Common ones such as splendid lobsters are distributed in the east and south China Seas.

The salt concentration of the shrimp body tissue is higher than that of the outside water, that is to say, the salt concentration of fresh water is low, the specific gravity is low, and the density is small.