This is a list of the mammal species recorded on and around Ascension Island. Ascension Island has two native mammal species, both of which are beaked whales in the genus Mesoplodon. Neither is thought to be at risk, but there is insufficient data collected on them to allow an assessment to be made.[1]
The order Cetacea includes whales, dolphins and porpoises. They are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.
^This list is derived from the IUCN Red List which lists species of mammals and includes those mammals that have recently been classified as extinct (since 1500 AD). The taxonomy and naming of the individual species is based on those used in existing Wikipedia articles as of 18 September 2021.