Seven-star fish has a strong ability to adapt to the environment, and usually lives in fresh water with the temperature of 1 -38 degrees. The wild seven-star fish likes to burrow and live in groups, and eats a variety of things, such as small fish, shrimp, insects and aquatic plants.

The wild heptacodium septemlobus will be sexually mature after 2 winter ages, and it will be sexually mature when it is raised artificially 1 winter age.

Seven-star fish spawn in April-June, with the most frequent spawning in May. 1 year spawns many times, with the number of each spawning about 500, and the water temperature during spawning is 18 -28 degrees.

During the breeding period, the female fish and the male fish will chase each other. The female fish will ovulate first, and then the male fish will ejaculate on the eggs, and the fertilized eggs will gather to surface in blocks. The parent fish has a strong instinct to protect the eggs, and it will protect them until the young fish hatch.