1. ippopotamo   stag   hippopotamus   gorilla   seal   Hint Half-n-half Clue   2. pinguino   hyena   otter   octopus   penguin   Half-n-half Clue   3. canguro   kangaroo   hyena   porcupine   dolphin   Half-n-half Clue   4. bisonte   porcupine   chimpanzee   bison   beaver   Half-n-half Clue   5. leonessa   whale   panther   chimpanzee   lioness   Half-n-half Clue   6. tricheco   kangaroo   walrus   reindeer   panda   Half-n-half Clue   7. gorilla   gorilla   bat   polar bear   beaver   Half-n-half Clue