Matted "Aiptasia-Eating" Leatherjacket Filefish - IndonesiaAcreichthys tomentosus Matted "Aiptasia Eating" Leatherjacket Filefish, also known as Bristletail Filefish, are well regarded for their usefulness in controlling pest anemones, such as Aiptasia, in reef aquariums. Known for their generally peaceful temperament, they make great additions to reef environments. However, it's important to note that males can become territorial towards one another, so it's best to keep a single male with multiple females