What do ghost fish eat?

There's no such thing as a "ghost fish" in the traditional sense, as a fish species. However, the term might refer to:

* Transparent fish: Some fish species are incredibly transparent, making them appear almost invisible. These fish might be called "ghost fish" due to their appearance. Examples include glassfish, barreleye fish, and some jellyfish.

* Deep-sea fish: Many deep-sea fish have unusual adaptations to their environment, including some that have a translucent or ghostly appearance. These fish often have different feeding strategies depending on the species, and some might eat things like:

* Zooplankton: Tiny organisms like crustaceans and other small invertebrates.

* Detritus: Decaying organic matter that falls from the surface layers.

* Other fish: Some deep-sea fish are predators and eat smaller fish.

If you could provide more context or a specific type of "ghost fish" you are interested in, I could give you a more precise answer!