1) Aquatic mammal 2) Eared fur seal 3) Eared seal 4) Fur seal 5) Sea lion 6) Seal or sea lion having ears 1) Eared seal 
• (n.) Any eared seal.
O'ta·ry noun ; plural Otaries . [ Greek ... large-eared, from ..., ..., ear: confer French otarie .] (Zoology) Any eared seal. 
The name otary is applied to any seal which has external ears (as opposed to the true seals which lack them). The eared seals make up the family Otariidae, which includes the Sea Lion and the Fur-seal of the North Pacific.
otary (s), otaries (pl) Any eared seal. Related 'ear' word families: auri-; myring-; tympano- (drum, stretched membrane).