Marine Mammal Commission

Status of Marine Mammal Species and Populations

The table below provides a list of marine mammal species and populations listed as endangered or threatened under the Endangered Species Act (ESA), or designated as depleted under the Marine Mammal Protection Act (MMPA). The MMPA gives special attention to depleted marine mammal species and populations. Species or populations are considered depleted if they are below their optimum sustainable population level, or are listed as endangered or threatened under the ESA.

Please visit our species of concern page or follow the links below to learn more about our work and what we do to help conserve marine mammals and their environment.

ESA Listing

Evaluation of marine mammals for listing under the ESA is done by either the U.S. Fish and Wildlife Service (for sirenians, otters, walruses, and polar bears) or the National Marine Fisheries Service (all other species).

MMPA Listing

All marine mammal species are protected under the MMPA; some designated as depleted. Please visit the National Marine Fisheries Service website for more information on MMPA listings.

Whales, Porpoises, and Dolphins

Beluga, Cook Inlet population

Delphinapterus leucas

Endangered

Depleted

Beluga, Sakhalin Bay-Nikolaya Bay-Amur River stock

Delphinapterus leucas

Not Listed

Depleted

Blue whale

Balaenoptera musculus

Endangered

Depleted

Bottlenose dolphin, U.S. mid-Atlantic coastal population

Tursiops truncatus

Not Listed

Depleted

Bowhead whale

Balaena mysticetus

Endangered

Depleted

Chinese river dolphin (baiji)

Lipotes vexillifer

Endangered

Depleted

Coastal spotted dolphin

Stenella attenuata graffmani

Not Listed

Depleted

False killer whale, Main Hawaiian Islands Insular

Pseudorca crassidens

Endangered

Depleted

Fin whale

Balaenoptera physalus

Endangered

Depleted

Gray whale, Western North Pacific population

Eschrichtius robustus

Endangered

Depleted

Hector’s Dolphin, Maui Dolphin subspecies

Cephalorhynchus hectori maui

Endangered

Depleted

Hector’s Dolphin, South Island subspecies

Cephalorhynchus hectori hectori

Threatened

Depleted

Humpback whale, Arabian Sea distinct population segment (DPS)

Megaptera novaeangliae

Endangered

Depleted

Humpback whale, Cape Verde Islands/Northwest Africa distinct population segment (DPS)

Megaptera novaeangliae

Endangered

Depleted

Humpback whale, Central America distinct population segment (DPS)

Megaptera novaeangliae

Endangered

Depleted

Humpback whale, Mexico distinct population segment (DPS)

Megaptera novaeangliae

Threatened

Depleted

Humpback whale, Western North Pacific distinct population segment (DPS)

Megaptera novaeangliae

Endangered

Depleted

Indus river dolphin

Platanista gangetica minor

Endangered

Depleted

Killer whale, AT1 population

Orcinus orca

Not Listed

Depleted

Killer whale, southern resident population

Orcinus orca

Endangered

Depleted

Northeastern offshore spotted dolphin

Stenella attenuata attenuata

Not Listed

Depleted

North Atlantic right whale

Eubalaena glacialis

Endangered

Depleted

North Pacific right whale

Eubalaena japonica

Endangered

Depleted

Sei whale

Balaenoptera borealis

Endangered

Depleted

Southern right whale

Eubalaena australis

Endangered

Depleted

Sperm whale

Physeter macrocephalus

Endangered

Depleted

Spinner dolphin, Eastern stock

Stenella longirostris orientalis

Not Listed

Depleted

Vaquita

Phocoena sinus

Endangered

Depleted

Seals and Sea Lions

Bearded seal, Beringia distinct population segment (DPS)

Erignathus barbatus

Threatened

Depleted

Bearded seal, Okhotsk distinct population segment (DPS)

Erignathus barbatus

Threatened

Depleted

Guadalupe fur seal

Arctocephalus townsendi

Threatened

Depleted

Hawaiian monk seal

Neomonachus schauinslandi

Endangered

Depleted

Mediterranean monk seal

Monachus monachus

Endangered

Depleted

Northern fur seal

Callorhinus ursinus

Not Listed

Depleted

Ringed seal, Arctic subspecies

Phoca hispida hispida

Threatened

Depleted

Ringed seal, Baltic subspecies

Phoca hispida botnica

Threatened

Depleted

Ringed seal, Ladoga subspecies

Phoca hispida ladogensis

Endangered

Depleted

Ringed seal, Okhotsk subspecies

Phoca hispida ochotensis

Threatened

Depleted

Ringed seal, Saimaa subspecies

Phoca hispida saimensis

Endangered

Depleted

Spotted seal, Southern distinct population segment (DPS)

Phoca largha

Threatened

Depleted

Steller sea lion, Western population

Eumetopias jubatus

Endangered

Depleted

Manatees and Dugongs

Amazonian manatee

Trichechus inunguis

Endangered

Depleted

Dugong

Dugong dugon

Endangered

Depleted

West African manatee

Trichechus senegalensis

Threatened

Depleted

West Indian manatee

Trichechus manatus

Endangered

Depleted

Polar Bear

Polar bear

Ursus maritimus

Threatened

Depleted

Otters

Marine otter

Lontra felina

Endangered

Depleted

Northern sea otter, Southwest Alaska population

Enhydra lutris kenyoni

Threatened

Depleted

Southern sea otter

Enhydra lutris nereis

Threatened

Depleted

For questions about the marine mammal species and populations listed on the table above, please contact mmc@mmc.gov.