1. 鱼   shellfish   fish   trout   lobster   Hint Half-n-half Clue   2. 三文鱼   crab   fish   salmon   shark   Half-n-half Clue   3. 沙丁鱼   cod   crab   lobster   sardine   Half-n-half Clue   4. 鲨鱼   fish   shark   tuna   shellfish   Half-n-half Clue   5. 鳟鱼   mackerel   shellfish   clam   trout   Half-n-half Clue   6. 金枪鱼   trout   tuna   salmon   shellfish   Half-n-half Clue   7. 龙虾   shellfish   crab   lobster   fish   Half-n-half Clue