Haliotis diversicolor is an economically important shellfish species in Taiwan. However, massive mortality of the Haliotis diversicolor has occurred at post-larval and grown out stages that resulted in production of Haliotis diversicolor has dramatically reduced in recent years. Genetic improvement plays an important role in sustainable development for Haliotis diversicolor aquaculture industry. This aim of project will focus on advantage in genetic, crossbreeding and constructed molecular markers, to establish superior economical traits of brood stocks. Our results indicate thatcross-breeding can increase the genetic diversity and improve the growth and survival rates of small abalone. Feeding with different treatment of kelps will affect abalone's servival rate and aquaculture water.