Moonyfish

Moonyfish is a common name used for several species of marine fish belonging to the family Monacanthidae. These fish are characterized by their deep, compressed bodies and a prominent, elongated dorsal fin spine, which gives them a "moony" or crescent-shaped appearance. They are also known as filefish, a name derived from their rough, sandpaper-like skin.

Moonyfish are found in tropical and subtropical waters worldwide, typically inhabiting coral reefs, seagrass beds, and rocky shores. They are often solitary or found in small groups. Their diet consists mainly of algae, small invertebrates, and occasionally small fish. Moonyfish have small mouths with sharp, beak-like teeth, adapted for scraping food from surfaces.

Reproduction in moonyfish involves the female laying eggs, which are then fertilized by the male. Some species exhibit parental care, with the female guarding the eggs until they hatch. Moonyfish are generally not targeted by commercial fisheries, though they may be caught as bycatch. Some species are kept in aquariums due to their unique appearance, but their specific dietary and environmental needs can make them challenging for novice aquarists. Their ecological role includes grazing on algae, which helps maintain the health of reef ecosystems.