Possum

A possum (plural form: possums) is any of about 70 small- to medium-sized arboreal marsupial species in suborder Phalangeriformes native toAustralia, New Guinea, and Sulawesi (and introduced to New Zealand and China). The name derives from their resemblance to the opossums of the Americas (the name is from Algonquian wapathemwa, not Greek or Latin, so the plural is possums, not possa or possi). Although opossums are also marsupials, possums are more closely related to other Australian marsupials such as kangaroos.possum class is Mammalia: source: Wikipedia 

Squirrels

Squirrels are generally Mammalia family. Squirrels are members of the family Sciuridae, a family that includes small or medium-size rodents. The squirrel family includes tree squirrels, ground squirrels, chipmunks, marmots (including woodchucks), flying squirrels, and prairie dogs amongst other rodents. Squirrels are indigenous to the Americas, Eurasia, and Africa, and were introduced by humans to Australia. The earliest known squirrels date from the Eocene period and are most closely related to the mountain beaver and to the dormouse among other living rodent families.

source: Wikipedia

Blue Jelly Fish

sourec:wikipedia
Cyanea lamarckii, also known as the blue jellyfish or blue fire jellyfish, is a species of jellyfish in the family Cyaneidae. Populations in the western Pacific around Japan are sometimes distinguished as Cyanea nozakii or Cyanea capillata nozakii. The majority of jelly fish aren't all that dangerous but others are deadly.