Dichotomous Key/Carnivora

1

 * Habitat
 * Aquatic -
 * Land -

2: Pinnipedia

 * Tusks
 * Present - ../Odobenidae/
 * Not present -

3: Fissipedia

 * Auditory bulla
 * Single-chambered or partially divided -
 * Double-chambered -

4

 * External ears
 * Present - ../Otariidae/, Sea lion
 * Not present - ../Phocidae/, Seal

5: Caniformia

 * Presence of scent glands used defensively
 * Present - ../Mephitidae/
 * Not present -

6: Feliformia

 * Anal scent glands
 * Present - ../Hyaenidae/
 * Not present -

7
Could be ../Mustelidae/, ../Ursidae/, ../Procyonidae/, or ../Canidae/.

8
Could be ../Felidae/, ../Herpestidae/, ../Viverridae/, or ../Nandiniidae/.