What is a prefix with fauna?

There isn't a single, universally accepted prefix for "fauna". However, there are several prefixes that can be used with "fauna" to create new words, depending on the specific meaning you want to convey.

Here are some examples:

* Microfauna: Refers to very small animals.

* Macrofauna: Refers to relatively large animals.

* Megafauna: Refers to very large animals, typically those that lived in the past.

* Zoo-fauna: Refers to animals that live in a zoo.

* Endo-fauna: Refers to animals that live inside another organism.

* Epi-fauna: Refers to animals that live on the surface of another organism.

* Bentho-fauna: Refers to animals that live at the bottom of the ocean.

* Plankto-fauna: Refers to animals that drift in the water column.

Ultimately, the best prefix to use will depend on the context and the specific meaning you want to convey.