Captive-Bred Aiptasia Eating Filefish - Acreichthys tomentosus

Small (<2")

$49.99

Captive-Bred Aiptasia Eating Filefish - Acreichthys tomentosus

Captive-Bred Filefish Reef Safe Caution

$49.99

SKU: FilefishxAiptasiaCBS

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Diet

Mysis Finely Chopped Seafood Aiptasia

Min Tank Size 30 gallons

Temperament Peaceful

Reef Safe With Caution

Care & Diet Feeding, nutrition, and best practices.

Diet Type: Omnivore

Aiptasia Eating Filefish are omnivorous, with a diet that should include a variety of foods to ensure nutritional balance. While they are known for consuming Aiptasia anemones, they may not rely solely on them. Supplement their diet with high-quality marine flakes, pellets, and frozen foods such as brine shrimp and mysis shrimp. Feeding should occur 2-3 times daily in small amounts to prevent overfeeding and maintain water quality. It's important to monitor their eating habits, as they can be finicky eaters, and adjust the diet as necessary to ensure they receive adequate nutrition.

Mysis Finely Chopped Seafood Aiptasia

Behavior Temperament, activity level, and interactions.

Temperament: Peaceful

Aiptasia Eating Filefish exhibits slow, deliberate swimming patterns, often hovering near coral reefs. Preferring solitude or small groups, it maintains a peaceful demeanor but may exhibit mild territoriality, especially in confined spaces. Generally compatible with other non-aggressive species, it can coexist with a variety of reef inhabitants. However, caution is advised with small crustaceans or ornamental invertebrates due to its natural predation tendencies. This filefish is particularly valued for its ability to control Aiptasia populations within aquariums, making it a beneficial addition for reef enthusiasts.

Tank & Aquascape Tank requirements and aquascaping tips.

Min Tank Size: 30 gallons
Max Size: 3.5 inches
Care Level: Easy
Origin: Indonesia

Compatibility Tank mates, aggression, and introduction order.

Temperament: Peaceful
Reef Safe: With Caution

Filefish Reef Safe With Caution Omnivore Aiptasia Eater

Reef & Health Reef safety, common issues, and prevention.

Reef Safe: With Caution
Care Level: Easy

FAQs Answers to the most common questions.

How can I encourage an Aiptasia Eating Filefish to start eating Aiptasia in my reef tank instead of prepared foods only?

Keep the fish slightly underfed but not starving, and limit rich prepared foods (like mysis and pellets) to small portions once per day. Place rocks with Aiptasia in a smaller acclimation box with the filefish inside the main tank for a few days so it “learns” them as food with minimal distractions. Target-feed small pieces of Aiptasia (scraped off and offered by tweezers) near its snout. Avoid feeding large meaty items that fully satisfy it. Once you see it nipping at Aiptasia consistently, you can release it into the full display and gradually return to a normal, varied diet.

My Aiptasia Eating Filefish cleared the Aiptasia and is now nipping at Zoas and LPS. Is there any way to stop the coral nipping behavior without removing the fish?

Increase feeding frequency with smaller, varied meals (mysis, brine, finely chopped clam, quality pellets, and algae-based foods) so it’s less motivated to graze on corals. Add alternative “graze targets” such as small pieces of clam or mussel on a rock, or dried nori clipped near its favorite area. Re-arrange or temporarily move the most targeted corals to break its routine. Sometimes moving the filefish to a different part of the tank in an acclimation box for a week resets habits. However, some individuals remain persistent coral nippers; if targeted corals are expensive or show continuous damage (recession, closed polyps for many days), the only reliable solution may be to rehome the fish or move it to a soft-coral or FOWLR setup.

How can I reliably sex Aiptasia Eating Filefish and what are the signs of a compatible pair versus two males fighting?

Males often show more orange or yellow spotting around the dorsal area and may develop a slightly more pronounced dorsal filament, but visual sexing is not always reliable. Behavior is a better guide: a compatible pair will often swim within sight of each other, display parallel swimming, and occasionally “hover” together near rockwork without extended chasing. Two males often engage in repeated short chases, flaring dorsal and anal fins, and facing off head-to-head with stiff body posture, sometimes with nipping at fins. In small tanks (under ~40 gallons), two males are more likely to fight, while a true pair usually settles into a loose bond with occasional mild displays but no persistent aggression.

What specific acclimation and quarantine steps help Aiptasia Eating Filefish transition from wild capture to reef-safe conditions and reduce the chance of disease?

Quarantine for at least 2–4 weeks in a bare-bottom or simple QT tank with plenty of PVC hideouts and a few small rocks seeded with Aiptasia. Start with drip acclimation, then keep salinity stable around 1.025 and temperature 24–26°C (75–79°F). Offer live or frozen foods that move in the current (mysis, enriched brine) and bits of Aiptasia on small rocks to trigger feeding. Observe for external parasites (spots, scratching, frayed fins) and internal issues (stringy white feces, bloating, refusal to eat). If needed, treat in QT with appropriate meds (e.g., praziquantel for internal worms, a copper or alternative protocol for ich/velvet, following product guidelines). Do not use copper in the display tank. Once eating multiple foods, showing no symptoms, and maintaining weight, transfer gently to the main tank with the lights dimmed to reduce stress.

In what tank sizes and social setups do Aiptasia Eating Filefish show the most natural behavior without becoming overly shy or aggressive?

For a single specimen, 30 gallons is an absolute minimum; 40+ gallons with moderate rockwork and multiple caves works better. This species often feels more secure with visual barriers, so avoid overly open aquascapes. They typically do well in peaceful community tanks with small to medium non-aggressive fish (clowns, gobies, fairy wrasses, chromis). Avoid large, boisterous tankmates (big triggers, aggressive tangs, large wrasses) that may intimidate them, causing constant hiding and poor feeding. If keeping a pair, aim for 55+ gallons with ample rock and at least two distinct “zones” so they can separate. Provide moderate flow and mid-level lighting; they’ll spend time picking at rock, occasionally hovering in midwater. A secure environment with low aggression helps them remain visible and active, making their Aiptasia-grazing behavior more reliable.

Goes well with:

You will receive a fish SIMILAR in design and size to the fish in the photo. This is NOT a WYSIWYG fish.

Aiptasia-Eating Filefish (Acreichthys tomentosus)

The Aiptasia Filefish is a unique, cryptically patterned reef dweller prized for its ability to control nuisance Aiptasia anemones. With its laterally compressed body, mottled greenish-tan coloration, and constantly shifting skin texture, this fish blends beautifully into live rock while performing a valuable cleanup role in reef aquariums.

Tank Requirements

Aiptasia Filefish do best in aquariums of 30 gallons or larger. They prefer a natural reef-like setup with plenty of live rock for grazing, hiding, and resting. Their calm and curious nature makes them enjoyable to observe as they glide and hover throughout the tank.

Diet and Feeding

In addition to Aiptasia, these filefish should be offered a varied diet to maintain health. Feed them a mix of frozen mysis, brine shrimp, finely chopped seafood, and high-quality prepared foods. Over time, they often accept pellets and flakes, especially when well-acclimated to their environment.

Reef Compatibility

Reef compatibility can be mixed. While many individuals behave well in reef tanks, some may nip at coral polyps or ornamental invertebrates once Aiptasia is gone. Success largely depends on the individual fish and the availability of food. Keeping them well-fed can reduce the chance of unwanted nibbling.

Introduction to Saltwater Filefish

Filefish are unique, intelligent marine fish recognized for their adaptive camouflage, elongated snouts, and inquisitive nature. They belong to the Monacanthidae family, closely related to triggerfish, and are found in tropical reefs worldwide. Filefish vary significantly by species—some are excellent for pest control, while others are specialized coral feeders, making research essential before purchase.

Care Requirements

Care Level: Moderate to Difficult Minimum Tank Size: 30 – 75+ gallons Aquarium Setup: Requires ample swimming space, rock structures for grazing, and a varied diet

Diet & Nutrition

Filefish have diverse diets depending on the species. Diet: Omnivorous – Requires a mix of plant and meaty foods

Recommended Foods:

Enriched frozen mysis and brine shrimp Marine algae and seaweed sheets Some species require coral polyps or aiptasia anemones The Aiptasia-Eating Filefish (Acreichthys tomentosus) is particularly popular for its ability to control pest anemones, though its reef safety varies by individual.

Lifespan & Growth Rate

Lifespan: 3-6+ years Growth Rate: Moderate – Can grow up to 6 inches, species-dependent Filefish are slow, deliberate swimmers that require stable water conditions and a consistent diet to thrive.

Temperament & Compatibility

Temperament: Peaceful to Semi-Aggressive – Can be territorial toward similar species Reef Safe? With Caution – Some species may nip at corals and invertebrates Filefish should be housed with peaceful to semi-aggressive tankmates and monitored for coral-nipping tendencies.

Common Challenges & Considerations

Selective Feeding: Some filefish reject prepared foods and require a specialized diet. Reef Safety Concerns: Certain species, like the Orange Spotted Filefish, are obligate coral feeders and difficult to sustain in home aquariums. Timid Nature: Can be bullied by aggressive fish, so tankmate selection is key.

Color Varieties & Popular Species

Aiptasia-Eating Filefish (Acreichthys tomentosus) – Helps control pest anemones, but individual reef safety varies Radial Filefish (Acreichthys radiatus) – Small, peaceful, with intricate patterns Orange Spotted Filefish (Oxymonacanthus longirostris) – Specialized coral feeder, extremely difficult to keep Fantail Filefish (Pervagor sp.) – Brightly colored, often seen in public aquariums These updated descriptions provide accurate, structured care details while keeping information digestible for buyers. Let me know if you need refinements!