aquatic mammal

Noun

Meaning

whales and dolphins; manatees and dugongs; walruses; seals

Source: WordNet

manatee otter dolphin walrus cetacea beluga mammal dugong porpoise cetacean bottlenose dolphin web-footed polar bear fur seal mustelid

Show all synonyms

blower cetacean sea cow pinniped sirenian pinnatiped

Aquatic mammal infants do not have REM sleep in infancy; citation REM sleep in those animals increases as they age. Source: Internet