What do black fish eat?

There isn't a single "black fish" species. The term "black fish" could refer to a variety of fish that are black or have a dark color.

To answer your question, I need to know what kind of fish you're asking about.

For example, if you're interested in:

* Black sea bass: They eat shrimp, crabs, squid, and other smaller fish.

* Black carp: They are omnivores and eat algae, plants, insects, and small fish.

* Blacktip shark: They eat smaller fish, crustaceans, and cephalopods.

Tell me more about the fish you're interested in and I can give you a more specific answer about their diet!