The suitable temperature for the black tongue hanging is 25℃～26℃, and it is best to use an aquarium with a size of more than 500 liters. After understanding the suitable water temperature for the black tongue hanging, let's introduce other information about it.

The body length of the black tongue corners is like an egg Round and flat, and does not change with growth. There are two shield-shaped bony plates on the caudal peduncle, each with a keel. The head is small and the back of the head is oblique and straight. As it grows, the adult fish has no horn-like protrusions on the front head, and there are brow-like protrusions between the eyes.

The body of the black tongue is uniformly blue-gray, the caudal fin is bright blue with a white margin, the pectoral fin is gray-yellow, and the remaining fin is the same color as the body.