The yellow-tailed blue devil is a very easy-to-raise breed, and the water quality requirements are not very strict. The appearance of the yellow-tailed blue devil is very attractive. They are not big. The adult fish is 4-7 cm long, but only the tail fin is bright yellow, and the body is sky blue. The shape is very charming.

The yellow-tailed blue devil is petite, swims fast, and is very lively and cute. In nature, they are always around the coral reefs, never far away, because in the event of a crisis, they will quickly burrow into the coral reefs to escape the attack. The body color of this genus is basically a single body color, mostly blue, but also yellow and black. There is no significant difference between males and females, with males becoming lighter in color during the breeding period.