Mizfit Monsterz are like what?

Here's a science or research project. We will give 5 random facts about all Mizfit Monsterz. Your job is to combine the 5 facts to figure out what one animal they are most like. Ready? 

1. Mizfit Monsterz CAN be venomous. Not really to humans, they choose not to be. But as a defense mechanism they CAN be. 

2. Mizfit Monsterz (especially those who struggle to see) are known as Monotremes. 

3. Mizfit Monsterz love to burrow (especially in their humans blankets).

4. Mizfit Monsterz have extra shoulder bones.

5. Mizfit Monsterz don't really fit in many places. They are their own type of Monster. 

Do some research and see what your thoughts are. We will post the answer in a few days.