1. マナティ   starfish   manatee   otter   shrimp   Hint Half-n-half Clue   2. ムラサキカイ   dolphin   manatee   whale   mussel   Half-n-half Clue   3. シーライオン   otter   turtle   seal   lobster   Half-n-half Clue   4. ヘビ   eel   otter   snail   crab   Half-n-half Clue   5. ウニ   seal   turtle   otter   sea urchin   Half-n-half Clue   6. メカジキ   swordfish   oyster   crab   seal   Half-n-half Clue   7. カワウソ   otter   sea urchin   shark   octopus   Half-n-half Clue