sentences:  Alaska subsistence communities are noted to obtain up to 97% of the omega-3 fatty acids through a subsistence diet.Tepas, also called "stinkheads, stink heads, stinky heads", are fermented fish head such as king and silver salmon heads, are a traditional food of the Yup'ik.A customary way of preparing them is to place fish heads and guts in a wooden barrel, cover it with burlap, and bury it in the ground for about a week.