* Plankton: Coelenterates use their tentacles to capture and eat zooplankton, which are microscopic animals that drift in the water.
* Small fish: Some coelenterates, such as jellyfish, can eat small fish that are stunned or killed by their stinging tentacles.
* Crustaceans: Coelenterates can also eat crustaceans, such as shrimp and krill.
* Other coelenterates: Some coelenterates, such as sea anemones, can eat other coelenterates, such as jellyfish.