1. くじら   octopus   whale   crab   lobster   Hint Half-n-half Clue   2. かき, しんじゅがい   mussel   oyster   dolphin   crab   Half-n-half Clue   3. かわうそ   mussel   otter   lobster   shrimp   Half-n-half Clue   4. いるか   mussel   dolphin   oyster   shrimp   Half-n-half Clue   5. たこ   manatee   turtle   octopus   jellyfish   Half-n-half Clue   6. うに   whale   sea urchin   swordfish   mussel   Half-n-half Clue   7. ひとで   eel   octopus   swordfish   starfish   Half-n-half Clue