Cute and Useful: The Matted "Aiptasia-eating" Filefish

The Matted, also known as the Aiptasia-eating or Bristletail, Filefish (Acreichthys tomentosus) is commonly associated with shallower seagrass beds and rubble areas near coral reefs. This fish has a large range and inhabits much of the Indo-Pacific region including Fiji, South Austrailia, and even East Africa. The Matted filefish is relatively compact, with most reaching about 3 inches (~7.6cm), though some have been reported at larger sizes. In their natural habitat, the major food sources are algae, micro crustaceans and even small sessile invertebrates (Cnidaria). Due to their small size and penchant to eat small sessile invertebrates, the matted filefish is often employed in reef aquaria to get rid of the pest anemone Aiptasia. Their is a moderate risk of them taking a liking to your coral and other anemones as a snack, but many find this is mitigated with frequent and heavy feedings.