Green Filefish

Overview

The Green Filefish is a slender, leaf-shaped fish with a mottled green-to-brown body that provides excellent camouflage among macroalgae and soft coral branches. It's best known in the hobby for its ability to eat pest Aiptasia anemones, making it a popular biological control option for keepers dealing with an outbreak.

Its unusual body shape and slow, deliberate swimming style give it a lot of character, and it tends to blend into rockwork and coral structure rather than swimming prominently in open water.

While useful for pest anemone control, this same appetite means it can also nip at the polyps of some soft corals or LPS given the chance, so it's rated reef safe with caution rather than fully safe.

Compatibility

Green Filefish are peaceful toward other fish and generally coexist well with a wide range of community tankmates. They rarely show aggression toward other species.

Reef compatibility is inconsistent — while valued for eating pest Aiptasia, some individuals will also nip at the polyps of soft corals, zoanthids, or LPS, so caution is warranted in a coral-focused display.

Health & quarantine

This species is generally hardy once acclimated, though it can be a bit shy and slow to settle in a new tank. A standard quarantine period of two to four weeks is recommended, and this species usually transitions onto a varied diet without major issues.