Delphinapterus leucas
Endangered
Depleted
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, 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
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
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
Eubalaena glacialis
Endangered
Depleted
Eubalaena japonica
Endangered
Depleted
Balaenoptera ricei
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
Taiwanese Humpback Dolphin
Sousa chinensis taiwanensis
Endangered
Depleted
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
Neomonachus schauinslandi
Endangered
Depleted
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
Trichechus manatus
Threatened
Depleted
Polar Bear
Ursus maritimus
Threatened
Depleted
Otters
Marine otter
Lontra felina
Endangered
Depleted
Northern sea otter, Southwest Alaska population
Enhydra lutris kenyoni
Threatened
Depleted
Enhydra lutris nereis
Threatened
Depleted
For questions about the marine mammal species and populations listed on the table above, please contact mmc@mmc.gov.