1. 鲨鱼   shark   whale   eel   crab   Hint Half-n-half Clue   2. 封印   clam   seal   lobster   sea urchin   Half-n-half Clue   3. 海胆   mussel   whale   octopus   sea urchin   Half-n-half Clue   4. 海星   clam   mussel   snail   starfish   Half-n-half Clue   5. 章鱼   clam   lobster   sea urchin   octopus   Half-n-half Clue   6. 水母   eel   jellyfish   clam   swordfish   Half-n-half Clue   7. 鳗鱼   mussel   snail   swordfish   eel   Half-n-half Clue