This is a small fish that lives in the ocean and belongs to the family Sciaenidae. The body presents a unique colorful color, hence the name colorful sea crucian carp. Rainbow fish is a kind of fish with strong adaptability to deep-sea environment, and usually lives in waters with water depth of 1000 meters or more.

Rainbow fish are small, usually only a few centimeters to dozens of centimeters long. The body presents bright and colorful colors, including red, orange, yellow, green, blue, purple and white. These colors are very eye-catching in the deep sea, making them very easy to identify in the dark underwater environment.