Is a wild Moorish idol an omnivore?

No, the Moorish idol is not an omnivore; it primarily feeds on a diet of coral polyps, algae, and small invertebrates, making it more of a herbivore with some carnivorous tendencies. Its diet mainly consists of zooplankton and various types of marine algae. While they may consume small animal matter occasionally, their feeding habits center around plant material and small organisms associated with coral reefs.