MAMMALS:
1. Dogs
2. Rats
3. Cats

BIRDS:
1. Cockatiel
2. African Grey Parrot
3. Cockatoos

REPTILES:
1. Snakes (In General)
2. Water Dragons (I don't know the names of any of them.
3. Iguana

FISH:
1. Clown Fish
2. Elephant-nose fish
3. ?

I cannot say these are really in order, I can't quite decide.