Acreichthys tomentosus Matted Leatherjacket Aiptasia Eater

The Seagrass Filefish (Acreichthys tomentosus) is one of the most effective and popular natural Aiptasia eaters in saltwater aquariums. With its specialized feeding behavior, it reliably helps to combat unwanted Aiptasia infestations—entirely without chemical agents. At the same time, it is a robust, peaceful, and interesting reef fish that impresses with its unique appearance and fascinating behavior.

🐟 Characteristics

• Size: Adult specimens reach about 8–10 cm.

• Coloration: Acreichthys tomentosus displays a variable greenish-brown camouflage coloration, which it can slightly change depending on its environment. This makes it a fascinating object of observation in the aquarium.

• Behavior: The Seagrass Filefish is peaceful, curious, and active. It moves slowly and hovers through the tank and fits perfectly into a mixed reef aquarium. It is particularly known for its ability to selectively feed on Aiptasia, making it a valuable helper in pest control.

🌊 Husbandry & Care

• Aquarium Size: Recommended from 200 liters. A well-structured reef with plenty of hiding places and calm zones is ideal.

• Water Parameters: Temperature: 24–27 °C, pH value: 8.0–8.4, Density: 1.022–1.025.

• Compatibility: Good with other peaceful reef fish, shrimp, and invertebrates. Caution with sensitive soft corals or polyps – in rare cases, it may also nip at them.

• Food: In addition to Aiptasia, it accepts frozen and live foods such as Artemia, Mysis, or Cyclops, as well as high-quality granulated food.

🌟 Special Features & Benefits

The Seagrass Filefish is arguably the most effective natural Aiptasia eater and thus an indispensable helper in a saltwater aquarium. It naturally combats these pesky pests and simultaneously contributes to the biological stability of the tank. Its interesting behavior, peaceful nature, and ability to change color also make it an exciting and attractive aquarium inhabitant.

With its useful function, easy husbandry, and calm disposition, Acreichthys tomentosus is an excellent choice for anyone who wants to effectively and sustainably rid their reef aquarium of Aiptasia.