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