The abalone Haliotis diversicolor Reeve is widely distributed along the coast of the southern East China Sea and the South China Sea. Rearing experiments were made on specimens larger than 6 cm collected from the coast waters of Dongshan Dao, Fujian Province. In this region, during the period from May to August, with water temperature between 24-28°C, large quantities of this abalone at different stages of sexual development may be found. Its main spawning season is from mid May to late June at water temperature between 25°Cto26°C. During the past three years we were suecessful in inducing spawning of sexually mature individuals under controlled temperature conditions. With an initial sea water temperature of 25.2°C, we gradually raised it to 28.7°C. Twenty minutes after we lowered the temperature of the water 2-3 degrees centigrade below the initial water temperature. Under such temperature conditions the sexually mature male individuals were observed to ejaculate and the female individuals to spawn. The fertilized eggs are spherical, with a diameter of 0.20 mm(ineluding egg membrane), the yolk measuring 0.16 mm. The division of the egg is total, unequal and spiral. The sequence of the embryonic development of the zygote is summarized as follows: During the veliger stage, at a mean temperature of 27°C, and with Platymonas elgolandaca var. tsingtaoensis as food, the shell increases about 15 μ each day. The shell of peristomal stage inereases about 50 μ each day,with the appearance of the first respiratory pore it inereases about 90 μ each day. The food during the larval stage consists of Platymonas,Navicula,Coconeis etc.,The juvenile with a length of 4-5 mm is able to eat the common algae.