1. かわうそ   starfish   oyster   sea urchin   otter   Hint Half-n-half Clue   2. かき, しんじゅがい   sea urchin   eel   oyster   dolphin   Half-n-half Clue   3. さめ   shark   octopus   oyster   shrimp   Half-n-half Clue   4. くじら   crab   whale   swordfish   lobster   Half-n-half Clue   5. むらさきかい   turtle   shark   lobster   mussel   Half-n-half Clue   6. いるか   dolphin   swordfish   eel   shark   Half-n-half Clue   7. ひとで   eel   clam   whale   starfish   Half-n-half Clue