1. うなぎ   eel   sea urchin   shrimp   swordfish   Hint Half-n-half Clue   2. へび   swordfish   eel   snail   otter   Half-n-half Clue   3. かき, しんじゅがい   jellyfish   clam   oyster   snail   Half-n-half Clue   4. うに   octopus   shrimp   swordfish   sea urchin   Half-n-half Clue   5. くじら   oyster   eel   whale   clam   Half-n-half Clue   6. かわうそ   sea urchin   otter   crab   oyster   Half-n-half Clue   7. さめ   swordfish   shark   oyster   whale   Half-n-half Clue