There are mammals in almost every category you listed.
Yup. Dragons are considered mammals right? I don't think they lay eggs. Or do they? I think I've heard cases of both laying eggs and other times they do not.
And then I'm pretty sure "Sea life" dolphins and whales as examples are mammals. Unless I'm wrong there too.
Next one I didn't catch the 1st time is the Undead and the Bacteria.
Not all bacteria is poisonous as there is bacteria that is actually used to create certain things that's edible. There is also bacteria inside the body, I guess the body are poisonous. No one touch anyone or you might die... Okay... you might die... but not from poison.
And then ghosts are dead. I don't know how dead can be considered undead. I guess a ghost and a vampire and a zombie are all the same thing.
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