Marine Mammals of the Aleutians Islands

 Marine mammals are the only mammals native to most of the Aleutian Islands unit of the Alaska Maritime National Wildlife Refuge. One exception is the red fox, endemic only to the easternmost islands of Umnak, Unalaska, Akutan, and Akun islands. (Humans introduced foxes and other animals to more islands from the late 1700s to the 1930s.)


Cetacea   Refuge Habitat - Abundance 
Gray whaleEschrichtius robustus Nearshore waters - common, E. Aleutians
Blue whaleBalaenoptera musculus Nearshore waters - rare
Fin whaleBalaenoptera physalus Nearshore waters - uncommon
Sei whaleBalaenoptera borealus Nearshore waters - uncommon
Minke whaleBalaenoptera acutorostrata Nearshore waters - common
Humpback whaleMegaptera novaeangliae Nearshore waters - common, E. Aleutians
Sperm whalePhyseter catodon Nearshore waters - common
Baird's beaked whaleBerardius bairdii Nearshore waters - rare
Stejneger's beaked whale   Mesoplodon stejnegeri Nearshore waters - uncommon
Cuvier's beaked whaleZiphius cavirostris Nearshore waters - rare
Killer whaleOrcinus orca Nearshore waters - common
Pacific white-sided dolphin   Lagenorhynchus obliquidens Nearshore waters - rare
Dall porpoisePhocoenoides dalli Nearshore waters - common
Sea otterEnhydra lutris Nearly all islands - declining sharply
Northern fur sealCallorhinus ursinus Bogoslof Island
Steller sea lionEumatopias jubatus Endangered species
WalrusOdobensus rosmarus Occasional record - rare
Harbor sealPhoca vitulina Nearly all islands - common
Northern elephant sealMirounga angustirostris Occasional record - rare