This is a list of the mammal species recorded in Saint Helena. These are the mammal species in Saint Helena, of which 0 are critically endangered, 0 are endangered, 1 is vulnerable, and 0 are near-threatened.
The following tags are used to highlight each species' conservation status as assessed by the IUCN:
Some species were assessed using an earlier set of criteria. Species assessed using this system have the following instead of Near Threatened and Least Concern categories:
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.
Suborder: Mysticeti
Family: Balaenopteridae
Genus: Balaenoptera
Common minke whale Balaenoptera acutorostrata LC
Antarctic minke whale Balaenoptera bonaerensis DD
Sei whale Balaenoptera borealis EN
Bryde's whale Balaenoptera brydei DD
Blue whale Balaenoptera musculus EN
Fin whale Balaenoptera physalus EN
Genus: Megaptera
Humpback whale Megaptera novaeangliae LC
Family: Balaenidae
Genus: Eubalaena
Southern right whale Eubalaena australis LC
Suborder: Odontoceti
Superfamily: Platanistoidea
Family: Physeteridae
Genus: Physeter
Sperm whale Physeter macrocephalus VU
Family: Kogiidae
Genus: Kogia
Pygmy sperm whale Kogia breviceps DD
Dwarf sperm whale Kogia sima DD
Family: Ziphidae
Genus: Berardius
Arnoux's Beaked Whale Berardius arnuxii DD
Subfamily: Hyperoodontinae
Genus: Mesoplodon
Blainville's beaked whale Mesoplodon densirostris DD
Gray's beaked whale Mesoplodon grayi DD
Hector's beaked whale Mesoplodon hectori DD
Strap-toothed whale Mesoplodon layardii DD
Genus: Ziphius
Cuvier's beaked whale Ziphius cavirostris DD
Family: Delphinidae (marine dolphins)
Genus: Steno
Rough-toothed dolphin Steno bredanensis DD
Genus: Tursiops
Common bottlenose dolphin Tursiops truncatus DD
Genus: Lagenodelphis
Fraser's dolphin Lagenodelphis hosei DD
Genus: Stenella
Pantropical spotted dolphin Stenella attenuata LR/cd
Atlantic spotted dolphin Stenella frontalis DD
Spinner dolphin Stenella longirostris LR/cd
Striped dolphin Stenella coeruleoalba DD
Genus: Orcinus
Killer whale Orcinus orca DD
Genus: Pseudorca
False killer whale Pseudorca crassidens LR/lc
Genus: Feresa
Pygmy killer whale Feresa attenuata DD
Genus: Globicephala
Short-finned pilot whale Globicephala macrorhynchus DD
Genus: Peponocephala
Melon-headed whale Peponocephala electra DD
There are over 260 species of carnivorans, the majority of which feed primarily on meat. They have a characteristic skull shape and dentition.
Suborder: Caniformia
Family: Otariidae (eared seals, sealions)
Genus: Arctocephalus
Subantarctic fur seal Arctocephalus tropicalis LR/lc
Family: Phocidae (earless seals)
Genus: Hydrurga
Leopard seal Hydrurga leptonyx LR/lc
Genus: Mirounga
Southern elephant seal Mirounga leonina LR/lc
