圆鳍鱼为辐鳍鱼纲鲉形目杜父鱼亚目圆鳍鱼科分布于北极一带200米深处生长的纯野生鱼种，体长可达61公分，鱼身营养价值高，鱼皮像甲鱼的裙边，胶原蛋白的含量高，鱼肉嫩滑，不饱和脂肪酸的含量高，骨头含钙量高。圆鳍鱼的腹鳍有类似虾虎鱼类腹鳍愈合成一盘状吸盘的特征。圆鳍鱼鱼卵在丹麦料理十分广泛地使用，除了会与减半或切片的烚蛋放在一起外，还有跟土墩虾(mounds of shrimp)，或是其他鱼类、海鲜等的组合。栖息在岩石底质、海草生长的底层水域，在产卵季节的时候，雄鱼在下面上变成淡红颜色，然而母鱼是蓝绿色，以栉水母、水母、小型甲壳动物、多毛类动物等为食。

Cyclopterus lumpus, the lumpsucker or lumpfish, is a species of marine fish in the family Cyclopteridae (lumpsuckers). It is the only member of the genus Cyclopterus. It is found in open water in the Norwegian and Barents Sea and around the coasts of Greenland and Canada. It ranges as far south as Chesapeake Bay (rare south of New Jersey) on the North American coast and Spain on the European coast.