Fanbelly Leatherjacket -Monacanthus chinensis

Monacanthus chinensis – Fan-bellied Leatherjacket

The Fan-bellied Leatherjacket (Monacanthus chinensis) is a fascinating and hardy filefish species found throughout the Indo-Pacific. Recognized for its distinctive fan-shaped belly flap and mottled, leaf-like patterning, this fish blends beautifully into its surroundings—making it a master of camouflage.

In the aquarium, Monacanthus chinensis is active, curious, and often personable once acclimated. They are omnivores, feeding on a mix of algae, small invertebrates, and prepared frozen foods. While generally peaceful, they may nip at soft corals or sessile inverts, so they are best suited for a fish-only or predator-style setup.

Quick Facts:

• Scientific Name: Monacanthus chinensis
• Common Name: Fan-bellied Leatherjacket
• Origin: Indo-Pacific
• Temperament: Semi-aggressive, curious
• Diet: Omnivore (algae, invertebrates, frozen/prepared foods)
• Reef Compatibility: With caution (may nip at corals and inverts)
• Care Level: Moderate
• Minimum Tank Size: 120 gallons

This unique filefish adds personality and intrigue to any marine aquarium. Its unusual appearance and quirky behavior make it a standout species for aquarists looking for something beyond the ordinary.