Freshwater fish cannot survive in the sea. Freshwater fish live in fresh water, the osmotic pressure of water is lower than the osmotic pressure of fish, so water will gradually infiltrate from its body surface, fish need to keep draining to maintain balance. Marine fish live in salt water, the osmotic pressure of salt water is higher than the osmotic pressure of fish, so water will gradually lose, fish need to drink water constantly. If a freshwater fish is put into the sea, it will lose water and die because of the high salinity.
1. Siraitia grosvenorii: Siraitia grosvenorii is an ornamental fish specially bred by hybridization. It gets its name because its head is similar to that of an arhat. This kind of fish's body shape is very broad, the body length and the body are much higher, the forehead is very full, and is not easy to get sick, very easy to raise. It has a wide range of feeding habits and can be fed with natural feed or artificial feed.
2. Silver arowana: The scientific name of silver arowana is arapaima dipalpis. Its body length is generally between 50-70 cm, and the maximum can reach about 120 cm. This fish lives in the tropics, more like quiet, usually fish, shrimp and shellfish for food, it is good at jumping, can catch prey on the surface of the branches.
3, map fish: map fish originated in South America, its shape is lovely, meat is also very delicious. They generally live in the middle and lower layers of water bodies, and have low requirements for water quality, so they can grow in weak acidic and alkaline waters. As a carnivorous fish, it should not be mixed with small tropical fish, otherwise it will eat them.
