1. 鲨鱼   shark   crab   mackerel   fish   Hint Half-n-half Clue   2. 沙丁鱼   lobster   trout   salmon   sardine   Half-n-half Clue   3. 贝类   shellfish   cod   shark   salmon   Half-n-half Clue   4. 鲭鱼   trout   fish   shellfish   mackerel   Half-n-half Clue   5. 虾   shark   shrimp   salmon   tuna   Half-n-half Clue   6. 鳟鱼   trout   cod   shellfish   salmon   Half-n-half Clue   7. 鱼   shellfish   mackerel   crab   fish   Half-n-half Clue