1. 蛸   dolphin   whale   octopus   swordfish   Hint Half-n-half Clue   2. 貝   clam   turtle   sea urchin   oyster   Half-n-half Clue   3. 海月,水母   dolphin   jellyfish   whale   oyster   Half-n-half Clue   4. 海老, 蝦   whale   shrimp   clam   jellyfish   Half-n-half Clue   5. 鮫   turtle   whale   octopus   shark   Half-n-half Clue   6. 蛇   snail   sea urchin   whale   otter   Half-n-half Clue   7. 獺   otter   turtle   jellyfish   swordfish   Half-n-half Clue