This project is aimed at collecting and culture Gelidium and Gracilaria spp. Three types of Gelidium have been collected and acclimated in tanks from Keelung, New Taipei county and Penghu. The asexually propagated algae have been attached to the artificial substrate (n> 50). As the temperature decreases in tanks during autumn and winter, the algae have gradually grown vertically upwards similar to the individual in the wild. Gelidium spore release and germination can be seen during the acclimation process. At present, Gelidium has a prostrate 0.5 cm diameter from sexual reproductive algae seedlings, and many upright fronds are formed. In order to develope sexual reproduction technology, we will continue to observe and record different life history stages. Gracilaria algae has been sampled 4 times from the ablone culture bait and once in the Changhua fish pond. Two different types of algae have been successfully acclimated and will undergo genetic analysis. In addition, in order to quickly assess the coverage of Gelidium in a large area, aerial photography records can confirm that the resources are the most abundant in late spring and early summer. The distribution area is reduced in late summer, and growth resumes in autumn and winter, which can indeed be used as resource assessment tools. However, the weather condition play a key role for getting good quality fo aerial image for analysis.