所以虹鳟鱼吃的和三文鱼不一样？  
  
【 在 sys075 (珠舟问沙) 的大作中提到: 】
:  天然水域的三文鱼肉之所以是红色的，是因为食物中吃了含有色素的物质，并不是三文鱼肉本身是红色的。
:  食物中包括藻类、鱼虾壳里含有虾青素和胡萝卜素。和饲喂虾青素一样是来自食物。
:  
:  Salmon flesh is generally orange to red, although white-fleshed wild salmon with white-black skin colour occurs. The natural colour of salmon results from carotenoid pigments, largely astaxanthin, but also canthaxanthin, in the flesh.[115] Wild salmon get these carotenoids from eating krill and other tiny shellfish.
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FROM 174.204.3.*