Unmanned aircraft vehicle (UAV) has emerged widely at the lower cost of obtaining remote sensing imagery, which can collect very high resolution (VHR) data from multispectral or SAR sensor modalities conveniently. This trend facilitates a transition from large scale land-use segmentation to object-level scene understanding. Reclamation aquaculture is one of the most important types of the coastal zone. It has a tight relationship between the marine ecology and economy. In this paper, some centimeter aerial remote sensing imagery is used to monitor reclamation aquaculture areas with unsupervised approaches. Experiments on actual reclamation aquaculture areas demonstrate effectiveness.