Humpback Whale (Western North Pacific DPS)

Critical habitat for the Western North Pacific DPS of humpback whales includes all marine waters within these designated areas:(1) Alaska. The nearshore boundaries are generally defined by the 1-m isobath relative to mean lower low water (MLLW). On the north side of the Aleutian Islands, the seaward boundary of the critical habitat is defined by a line extending due west from 55° 41' N, 162° 41' W to 55° 41' N, 169° 30' W, then southward through Samalga Pass to a boundary drawn along the 2,000-m isobath on the south side of the islands. This isobath forms the southern boundary of the critical habitat, eastward to 164° 25' W. From this point, the 1,000-m isobath forms the offshore boundary, which extends eastward to 158° 39' W. Critical habitat also includes the waters around Kodiak Island and the Barren Islands. The western boundary for this area runs southward along 154° 54' W to the 1,000-m depth contour, and then extends eastward to a boundary at 150° 40' W. The area also extends northward to the mouth of Cook Inlet where it is bounded by a line that extends from Cape Douglas across the inlet to Cape Adam. Critical habitat does not include manmade structures (e.g., ferry docks, sea plane facilities) and the land on which they rest within the critical habitat boundaries.Please see the final rule for additional information.

Spatial data for designated critical habitat of the humpback whale (Western North Pacific DPS) published in 86 FR 21082 on April 21, 2021.

These data are not the official legal definition of critical habitat. The Code of Federal Regulations (50 CFR 226.227) is the source for the legal definition of the critical habitat designation. These data should not be used for enforcement or navigation.

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