1. Freshwater grouper can lay eggs as soon as it reaches winter age. The spawning habit is the same as that of tilapia, which digs many spawning nests at the bottom of the pond. Spawning usually takes place in the afternoon, and after spawning, the female fish mainly guards the fertilized eggs.

2. Male fish will also guard together, but as the embryo develops, the guarding behavior becomes weaker and weaker. The eggs are oval in shape, yellowish-dark green in color, opaque, and sticky. The eggs are scattered and arranged on the bottom of the pool, with little overlap. A female fish weighing 140 grams lays about 3000-4000 eggs each time. The fertilized eggs can hatch into larvae in 48 hours at a water temperature of 26-29°C.

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