However, doing so requires "processing" each fish individually, not only taking time but also resulting in high failure rates. Injected coloring retains its effect for only three weeks to a month before degrading and fading.
不過，打色素的魚要一隻一隻「加工」，不但耗時、折損率也高，打進去的色素更只能維持三個星期到一個月就分解、褪色了。