In addition, caution must be exercised to minimize environmental impact, as most widely consumed fish are raised in publicly accessible environments. Even more dangerous is the practice of raising fish in cage nets in the open sea. Should the net rupture, transgenic fish would enter the natural environment, with unpredictable consequences.
此外，對環境的衝擊更是要謹慎小心，因為食用魚多採開放式養殖，任何人都可以去捕撈，鳥也會去吃，在海裡的箱網養殖模式危險性更高，一旦網破了，轉殖魚流入自然界，對環境造成的衝擊是難以預料的。