The ice caps are melting affecting the hunting grounds for polar bears that have been seen to feed on star fish and opportunistically catching caribou. The expansion of humans has seen caribou populations restricted to smaller areas increasing their density making them easier for polar bears to catch. This change in the feeding behaviour of polar bears is an encouraging sign as they may not be able to hunt their main prey (seals) in the future. However, whether a diet of star fish is enough for a large polar bear only time will tell.