Landings of lumpfish roe varied from approximately 2000-8000 tonnes from 1977-2018. The preferred diets of smooth lumpfish are medusa and ctenophores. They are closely related to the sculpins (family Cottidae) and lumpfish (family Cyclopteridae). Other fish often caught on trawlers simultaneously with lumpfish include cod. Smooth lumpfish are widely distributed throughout the North Pacific, especially the Aleutian Basin. Specifically cultured for this job are lumpfish ("Cyclopterus lumpus") and ballan wrasse ("Labrus bergeylta"). Lumpfish are sexually dimorphic with females reaching larger sizes than the males. "Hemitripterus villosus", smooth lumpfish ("Aptocyclus ventricosus") and "Myoxocephalus" spp. A "sea owl" is a lumpfish of the North Atlantic. Lumpfish ("stenbider") roe is another roe used in Danish cuisine.