Typically a skinner knife has wide, short, curved blade.
Their curved shape was developed to minimize the risk of puncturing hides during the skinning process, and to allow for maximal use of the heel region of the blade.
Contrary to popular misconception, the tip region of the blade should ideally never be used for skinning.
[1] Skinning knives were a common item on the American frontier, often imported from Sheffield, England, and distributed by the Hudson's Bay Company.
[2] Among frontiersmen, the saying "done up to Green River" signified the quality of something or their satisfaction with a trade deal.