Koi doesn't know its owner. Fish are relatively primitive animals, and most of them have no ability to recognize the Lord. However, if they are raised for a long time, they can make fish not afraid of people and take the initiative to approach what they want to eat, but for strangers, they are still very timid. In addition, raising fish is different from raising other animals, because the ability of interaction is poor through the glass, so don't expect to do any training, just raise it simply.

1. Silver Arowana: The scientific name of Silver Arowana is double-bearded tongue fish, and its length is generally between 50-70 cm, and the wild one can reach 120 cm. It is a large and medium-sized freshwater fish with silvery white body. It generally lives in tropical rivers and lakes, likes quiet environment, and usually feeds on fish, shrimp and shellfish.

2. Siraitia grosvenorii: Siraitia grosvenorii is also called Sparus macrocephalus. It is a cultivated ornamental fish, which is named after its head resembling Arhat. This kind of fish is broad, flat on the side, with towering and full forehead beads on its head, and it is very easy to raise. It prefers weakly alkaline water quality, and it grows well when the water temperature is 28 ℃.

3. Map fish: Map fish is a large tropical fish, which looks a bit like tilapia. Its body color is black, white and Huang San, and it also has red spots, which looks like a map. This kind of fish can survive in the water temperature of 22-32 ℃, and has lax requirements on water quality. It generally eats meat and can also accept artificial feed.