1. クラゲ   crab   mussel   oyster   jellyfish   Hint Half-n-half Clue   2. イルカ   manatee   dolphin   crab   starfish   Half-n-half Clue   3. シーライオン   starfish   seal   octopus   oyster   Half-n-half Clue   4. カキ、シンジュガイ   crab   otter   oyster   lobster   Half-n-half Clue   5. ウナギ   otter   eel   lobster   seal   Half-n-half Clue   6. ヒトデ   seal   starfish   sea urchin   snail   Half-n-half Clue   7. タコ   oyster   octopus   eel   seal   Half-n-half Clue