O

Here are all the O combos

Ocelot = Jaguar + Mouse Octopus = Starfish + Sea Devil Ogre = Cyclops + Zombie Okapi = Giraffe + Donkey Opossum = Badger + Bear Orangutan = Monkey + Raven Ostrich = Chicken +Do-Do Owl = Dove + Mole Owlet = Owl + Mouse Oyster = Trepang + Nautilus