1. サメ   dolphin   shark   snail   starfish   Hint Half-n-half Clue   2. カキ、シンジュガイ   manatee   seal   oyster   eel   Half-n-half Clue   3. ウナギ   turtle   lobster   swordfish   eel   Half-n-half Clue   4. ウニ   sea urchin   whale   mussel   dolphin   Half-n-half Clue   5. シーライオン   seal   jellyfish   swordfish   whale   Half-n-half Clue   6. エビ   shark   seal   eel   shrimp   Half-n-half Clue   7. クジラ   jellyfish   starfish   mussel   whale   Half-n-half Clue