The hard clam is a very important economic shellfish in Taiwan, and in recent years, due to the large demand for hard clams and the booming breeding technology, the hard clam has become a very important species for breeding in mainland China. In this year's project, we will select the F1 strains of hard clams using different genetic markers we selected two years ago. Four different shell colors will also be used to analyze the morphology of the F1 offspring. We are hoping that the various strains of hard clam with different characteristics will be able to adapt to the current breeding environment. On the other hand, the breeding industry of small abalone (Haliotis diversicolor) in Taiwan has been plagued by its low genetic variation due to artificial selection by breeders, thereby resulting in slow growth, the small size of mature individuals, and poor success rate for small abalone. The research team intends to improve the breeding strains by introducing different sources of small abalone, and the primary method is to use crossbreeding to increase the genetic variation to improve the survival rate of breeding small abalone. Therefore, our research team has been collecting wild small abalone of good quality from Taiwan coastal waters since a couple of years ago as the breeding source. Currently, we have produced the strains named108 strain and its F2, and we will continue the work of field cultivation, genetic variation tracking, and strain fixation for this strain.