Having compared the overall sighting rate for Taiwan's humpback dolphins (three populations per 100 kilometers) and the sighting rate along the Changhua coast (0.46 populations per 100 kilometers), and based on analysis of Changhua coastal behavior records, Chou has concluded that the humpback dolphins off the Changhua coast are mostly just passing through. In the waters near the proposed Kuokuang Petrochemical complex, she has only once spotted a dolphin feeding.
周蓮香在比對全台灣的白海豚目擊率（每 100 公里出現 3 群次）和彰化沿岸的目擊率（每 100 公里 0.46 群次），並分析彰化沿岸行為紀錄後指出，白海豚在此的活動以路過式的「移動」為主，國光石化基地附近海域甚至只見到一次海豚覓食。