1. カキ、シンジュガイ   lobster   shrimp   swordfish   oyster   Hint Half-n-half Clue   2. クジラ   otter   octopus   eel   whale   Half-n-half Clue   3. クラゲ   whale   otter   dolphin   jellyfish   Half-n-half Clue   4. カワウソ   dolphin   octopus   jellyfish   otter   Half-n-half Clue   5. エビ   shrimp   manatee   starfish   sea urchin   Half-n-half Clue   6. カニ   mussel   crab   octopus   shark   Half-n-half Clue   7. エビ   lobster   mussel   oyster   shark   Half-n-half Clue