* Jellyfish: They are known to consume vast quantities of jellyfish, which are their primary food source.
* Salps: These are free-floating tunicates that resemble jellyfish, but are actually more closely related to vertebrates.
* Small fish: Moonfish occasionally supplement their diet with smaller fish and other small marine organisms.
* Zooplankton: They also filter-feed on zooplankton, which are microscopic animals that drift in the water.
Interesting Facts:
* Moonfish have a very large mouth but lack teeth. Instead, they have a specialized pharynx with bony plates that grind up their prey.
* They are thought to eat up to 1,500 pounds of jellyfish per day!
* They play an important role in controlling jellyfish populations, which can help to maintain the health of marine ecosystems.