Is arowana a tropical fish?

Arowana is a tropical fish. The adult fish is 50-70 cm long, with the maximum overall length of 120 cm. It is a medium and large freshwater fish. The body was tied. The oral fissure is obviously inclined downward, and the lower jaw covers the upper jaw. The mandible has a structure similar to a nursing bag, which can be used for oral incubation of larvae.

Eyes are big and flexible. The scale is large, and the outer edge of the scale is pink orange, which gradually fades with growth. The anal fin extends from the back of the anus to the caudal stalk, and the dorsal fin is slightly shorter than the anal fin. The head and gill cover have large plate-like bones, which are honeycomb-shaped and can be used to breathe outside air.

Dorsal fin and gluteal fin are longer and located behind the rest. The pectoral fin is very big. The ventral fin is located behind the pectoral fin. The caudal fin is very short. The body is covered with huge scales, which are pink semicircles. The body is silvery white, containing light mixed colors such as blue and cyan.

Extended data:

The suitable water level of Yinlong fish tank is 1 20 cm per month, 25 cm in February, 30 cm in March, and 35 ~ 40 cm later.

rice. Depending on the water quality, 1 month, suck 1 time every 3 ~ 5 days (suck the sewage at the bottom of the pond), and suck 1 time every day since February, with no pollution exceeding each time.

Cross the water level of 5 cm.

Clean filter cotton, activated carbon, etc. Every 5 ~ 7 days 1 time. During the whole feeding process, the pH value of water should be strictly controlled.

Dissolved oxygen, temperature, etc. PH value is 6.8 ~ 7.2, dissolved oxygen is 7 mg/L, and temperature is 28℃.

Once the water body is found to have adverse changes, corresponding measures should be taken immediately to adjust it.