Also known as the American Blue Devil, the Swallowtail Blue Devil is produced in the Caribbean, Bermuda, and the waters of southern Florida, and is not commonly used in trade. They have bright colors, a gentle personality, and like the Green Devil, they like to move in groups. The largest individuals can be up to 10 cm long, and most of them are 5–6 cm juveniles in the trade.
Chinese name: Swallowtail Blue Devil
The English name is blue chromis
Scientific name: chromis cyaneus
Minimum aquarium size: 150 liters
Feeding difficulty: Easy
Feeding requirements: salinity 1.020-1.025
PH 8.1-8.4
Temperament: Mild
Maximum adult size of aquarium: 12.5 cm
Coral Compatibility: Safe
It is rarely available domestically because traders are reluctant to go to great lengths to import this inexpensive fish from the United States. Many Europeans are very fond of this fish, and they keep the swallowtail blue devil and the green devil and the gem in the same large reef ecological aquarium to see how the fish mix into a large group of movements. Do not let the temperature of the feeding water be too high, if it is higher than 28 ° C, this fish is prone to sudden death.