Description
Tank Bred Aiptasia-Eating Filefish — Acreichthys tomentosus Effective pest control with risks. Reef-safe with caution. Quick facts Size: 7–9 cm Temperament: Generally peaceful; can nip Reef-safe: With caution (zoas, LPS, clams at risk) Minimum tank: 120+ l / 30+ gal Role: Potential Aiptasia predator Aquarium Aquascape: Live rock with hiding spots and open water for cruising. Water: pH 8.1–8.4, salinity 1.025–1.026, temp 24–26 °C; NH3/NO2 0, NO3 <20 ppm. Flow: Low–moderate. Cover: Advisable; can jump when startled. Diet Primary: Meaty marine foods. Train to accept frozen mysis, chopped shrimp/clam, quality marine pellets. Aiptasia: Often eats Aiptasia but not guaranteed; appetite can vary by individual. Schedule: Small feedings 1–2× daily to reduce coral nipping once pests are gone. Behavior and compatibility Coral risk: May nip zoanthids, fleshy LPS, SPS polyps, anemones, feather dusters, and clam mantles. Tankmates: Peaceful community fish; avoid fin-nippers and large predators. Social: Keep singly; pairs only in large tanks and introduced together. Acclimation and care Acclimate: 30–45 min drip; dim lights. Observation: Camouflages and may hide at first; feeding response is the best health indicator. After pest control: Be ready to rehome if coral nipping starts. Buyer’s checklist Eating frozen or pellets at the store. Rounded belly, alert, no frayed mouth or pinched look. Accept that Aiptasia control is not guaranteed and coral nipping is possible.
