"Good fish" can be eaten by anyone irrespective of their sex. Only males can eat "bad fish," and only those who are grandfathers can eat "old men's fish."
這套分類中主要將魚分為不論性別都能吃的「好魚」、只有男性能吃的「壞魚」，與只有祖父級男性才能吃的「老人魚」。