What is a twelve-legged animal called?

There's no specific name for a twelve-legged animal because no animal naturally has twelve legs. Here's why:

* Arthropods: Many insects and other arthropods have multiple legs, but they come in pairs. This means they'd have an even number of legs like 6, 8, 10, etc.

* Vertebrates: Animals with backbones like mammals, reptiles, birds, and fish have four legs or two legs (in the case of birds).

So, if you encounter a creature with twelve legs, it's likely a fictional creature or an anomaly in nature!