sentences:  For a short while in modern times, plastic bags and buckets replaced the barrel.However this increased the risk of botulism, and the Yup'ik Eskimos have reverted to fermenting fishheads directly in the ground.Muktuk ("mangtak" in Yukon, Unaliq-Pastuliq, Chevak, "mangengtak" in Bristol Bay) is the traditional Eskimo meal of frozen raw beluga whale skin (dark epidermis) with attached subcutaneous fat (blubber).