No, because the platypus is not a marsupial. A platypus is a monotreme (egg-laying mammal).
It is not the only venomous mammal. "Venomous" is the correct term, rather than "poisonous", as things which are poisonous must be ingested, i.e. eaten or drunk. Other venomous marsupials include the Cuban solenodon, Eurasian Water Shrew, Northern Short-tailed Shrew and Southern Short-tailed Shrew, just to name a few.
A wallaby is a marsupial. The only monotremes, or egg-laying mammals, are the platypus and the echidna.
No. A possum is a marsupial. The only monotremes are the platypus and the echidna.
You're thinking of the platypus, which lays eggs and can eject venom. But the platypus isn't a marsupial. No marsupial lays eggs or is venomous. The platypus is part of a small group called the Monotremes.
The platypus is a monotreme mammal.
No, they are a marsupial and not a monotreme. There are only 2 members in the monotreme category which are the echidna and the platypus.
No. They are very territorial and VERY dangerous but not poisonous.
No. The platypus is an Australian monotreme. The platypus is found nowhere else in the world apart from Australia. However, it is not a marsupial, as marsupials give both to live young. The platypus is classified as a monotreme because it is a mammal that lays eggs.
No. Some fish are extremely poisonous as well as the platypus and some insects.
platypus!!
platypus Technical point #1: Since only the male platypus has the venomous spurs, and only the female platypus lays eggs, there would actually not be any venomous egg-laying mammals. Technical point #2: There are no egg-laying marsupials. The platypus belongs to the monotremes.
No. The koala is an example of a marsupial. The only two examples of monotremes, or egg-laying mammals, are the platypus and te echidna.
Neither one is "poisonous", but an adult male platypus has a venomous spur through which it can deliver a powerful and agonising venom.