圆鳍鱼科(Cyclopterus lumpus)使其在轻快的北大西洋。修改腹鳍,它使本身吸岩石,海藻,或任何其他结构。这方便的鱼没有鱼鳔,和小于水动力形式。北部国家土地硬骨鱼的鱼卵,您可能会发现在你的杂货店“圆鳍鱼科鱼子酱。”The lumpfish has recently gained fame for its cleanerfish ability as a biological delouser; lumpfish will feed on sea lice which infect salmonids. This has made them quite a popular cage-mate for Atlantic salmon in commercial operations – resulting in an aquaculture boom to provide millions of lumpfish for an environmentally-friendly way of mitigating the damage and cost caused by sea lice.