Zhangzidao Fishery Group, a Chinese aquaculture company, recycles uneaten fishfeed to fertilise crops.
大连的海洋食品企业獐子岛渔业集团，重复利用剩鱼来肥沃庄稼。
2
Doctor fishfeed on dead skin.For this reason, a visit to a spa pool teeming with doctor fish is regarded as a good treatment for people with psoriasis.