This final rule revises regulations for seasons, harvest limits, methods, and means related to taking of fish for subsistence uses in Alaska during the 2019-2020 and 2020-2021 regulatory years. The Federal Subsistence Board (Board) completes the biennial process of revising subsistence hunting and trapping regulations in even-numbered years and subsistence fishing and shellfish regulations in odd-numbered years; public proposal and review processes take place during the preceding year. The Board also addresses customary and traditional use determinations during the applicable biennial cycle. This rule also revises fish customary and traditional use determinations.