1. 河馬   hippopotamus   hedgehog   whale   rhinoceros   Hint Half-n-half Clue   2. 雌ライオン   lioness   polar bear   dolphin   hedgehog   Half-n-half Clue   3. 鮫   shark   whale   rhinoceros   dolphin   Half-n-half Clue   4. 蛸   hippopotamus   dolphin   rhinoceros   octopus   Half-n-half Clue   5. 鯨   shark   antelope   ox   whale   Half-n-half Clue   6. 雌馬   octopus   stag   panther   mare   Half-n-half Clue   7. 獺, 川獺   lioness   otter   hare   shark   Half-n-half Clue