In my opinion the best animal in the word is a DOG

In my opinion the worst animal in the word is a HIENA 

In my opinion the biggest animal in the word is a "BALEIA AZUL" (Balaenoptera musculus)

In my opinion the most beautiful animanimal in the word is a 

DOG

In my opinion the smalles animal in the word is a "BEIJA-FROL CUBANO"

In my opinion the most dangerous animal in the word is a ELEPHANT

In my opinion the fastest animal in the word is a LEOPARD