Aquariums can generally keep: black shark, white shark, lemon shark, leopard shark, nurse shark, sand tiger shark, high-fin shark, hinge shark, tiger shark, cat shark and dog shark (according to my understanding of domestic aquariums, that's all, but I know that a bull shark has been imported into Shenzhen Aquarium, which has caused great losses by mistake).

There are far fewer aquariums: black sharks, white sharks, lemon sharks, cat sharks and dog sharks. The first three are medium sharks, and the last two are small sharks. They can't mix.

Most sharks can breathe in two ways: the first one is never-ending type, with insufficient lung function, so they must swim to speed up the filtration of water from gills in order to absorb more oxygen-black fin shark and lemon shark. Advantages: strong appreciation, smooth lines and beautiful appearance (never-ending swimming) Disadvantages: high price, large water body needed, especially width, because of large turning radius and large oxygen consumption. The second type is the stop-and-go type: whitetip shark, dog shark and cat shark. The latter two can't be mixed with whitetip and will be eaten. Advantages: cheap, durable, disadvantages: not as beautiful as the first one.

According to my breeding experience, the body length of whitetip sharks ranges from 60 to 300, and the smallest new juvenile fish is 60 cm. Black-headed sharks are basically the same as lemon sharks, with black fins of 45- 180, but they don't grow big in the aquarium and grow slowly. I don't think dog sharks and cat sharks should be kept It's all in the seafood restaurant, and it's only edible but not ornamental, so

Only these three kinds are common in the market: black shark, white shark and lemon shark. I don't know the market price, because I made my own shark. My prices are about black shark 1800, white shark 1000 and lemon shark 1600 (including freight).

As for the smallest size of the aquarium, it is 160*70*60, so the extreme fish can live in it, but no emergencies can happen. If economic conditions permit, that's almost it.

Sharks have a strong resistance to life: strong adaptability to salinity (euryhaline), strong hunger tolerance (I couldn't feed them last month), strong adaptability to temperature (22-34 degrees in front of the water dispenser in my fish tank is fine), and strong appreciation (watching it, swimming constantly, eating food with it, it's very exciting, especially when the food falls, it's very enjoyable.