Ocelot. Also known as the Painted Leopard!Octopus. There are around 300 different species! Okapi. Eats more than 100 different types of plant! Old English Sheepdog. Intelligent, sociable and playful! Olm. Inhabits dark underwater caves.Opossum. Thought to be immune to certain snake venom! Orang-utan. Ostrich.