1. rhinoceros   hipopótamo   ballena   buey   rinoceronte   Hint Half-n-half Clue   2. koala   koala   erizo   canguro   chacal   Half-n-half Clue   3. octopus   koala   panda, oso panda   reno   pulpo   Half-n-half Clue   4. seal   ballena   castor   chacal   foca   Half-n-half Clue   5. whale   oso polar   pantera   ballena   nutria   Half-n-half Clue   6. toad   koala   pulpo   sapo   erizo   Half-n-half Clue   7. antelope   morsa   antílope   chacal   delfín   Half-n-half Clue