To Hudson's credit, they have included a decent amount of animals, with an elephant, zebra, (mutant) hippopotamus, lion, bear, tapir and panda; but it just seems pointless when they all act exactly the same. Put the Wii Remote down and they'll sleep the whole day – maybe getting up to yawn every now and then, have an enormous bowel movement and go straight back to sleep in it. Who needs blankets anyway. Additional animals can also be purchased for 100 Points each (all DLC was free in My Aquarium), including a koala which will be made available early 2010. Exciting!
Stick with My Aquarium. Unless you have a serious thing for faeces, My Zoo is a complete failure.