Fish includes chub, dace, and roach. Tributaries of Ribble include Loud, Stock Beck, Main River, Calder and Darwen. Tributaries of Wyre include Barton Brook, New Draught Brook and Woodplumpton Brook. Lune main river. Tributaries of Douglas include Yarrow, main river, Lostock, Slate Brook, Tawd. Tributaries of Alt include Downholland Brook, main River, Halls Folley, Cunscough Brook, Barton Brook, and main river.