1. ox   burro, asno   yegua   buey   ballena   Hint Half-n-half Clue   2. hedgehog   morsa   koala   reno   erizo   Half-n-half Clue   3. dolphin   delfín   gorila   liebre   nutria   Half-n-half Clue   4. bulldog   buldog   buey   panda, oso panda   castor   Half-n-half Clue   5. rhinoceros   panda, oso panda   puerco espín   leona   rinoceronte   Half-n-half Clue   6. kangaroo   tiburón   canguro   foca   chimpancé   Half-n-half Clue   7. antelope   antílope   oso polar   burro, asno   nutria   Half-n-half Clue