Tell us about all of those marsupials in Australia. All of the native land mammals are marsupials. There are some mammals that live in the sea such as dolphins, whales, and seals, that are not marsupials. Its a pouched animal. They come in forward and backward opening varieties.
Kangaroos have forward opening pouches.
Tasmanian Devils have backward opeing pouches. The backward pouches prevent damage from sticks when walking through the bush. The smallest marsupial is a marsupial mouse. The largest carnivor was the Tasmanian Tiger, which is now believed to be extinct. The largest would be the Red Kangaroo.