Arowana is an ancient freshwater fish, native to Malaysia and other places. This kind of fish is about 50-65 cm long and can live for decades. It is a popular large tropical ornamental fish at present. Because of its large size, it is best to provide a certain amount of water flow when raising it to ensure that it can move better.

Map fish is a large tropical fish for food and ornamental. It generally lives in the middle and lower layers of water body, and has lax requirements on water quality, and the water temperature should be kept between 22-32 ℃. This kind of fish is carnivorous and fierce, so it can't be raised with smaller fish, and it usually feeds a large amount of food.

Siraitia grosvenorii, also called Sparus macrocephalus, is an artificially bred ornamental fish. It is burly and has a big bag on its head, which looks very beautiful. This kind of fish is easy to raise, likes weakly alkaline water quality, and the water temperature should be kept above 28 ℃. Because it has a wide range of feeding habits, there are many foods to choose from.

Lucky fish, also called warship, is a fish of the family Percidae and the largest fish of its kind. Because of its large size, it needs proper water flow to promote its movement. This kind of fish has lax requirements on water quality and has suprambranchial apparatus, so it can swim to the water surface to breathe when dissolved oxygen is low.

Parrot fish is a hybrid of purple red fire mouth and red devil fish, which has no reproductive ability. This kind of fish is blood red, so it is also called blood parrot. It is worth mentioning that, due to genetic defects, its mouth cannot be closed, so it requires high dissolved oxygen in water, and it cannot be raised if the oxygen is low.