Tassled Filefish - Chaetodermis penicilligerus

Small

$135.99

$135.99 $169.99

Tassled Filefish - Chaetodermis penicilligerus

Filefish Non Reef Safe

$135.99

$135.99 $169.99

SKU: FILExTassledS

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Diet

mysis shrimp brine shrimp algae marine flakes

Min Tank Size 50 gallons

Temperament Peaceful

Reef Safe Yes

Care & Diet Feeding, nutrition, and best practices.

Diet Type: Omnivore

Diet and Feeding: Tassled Filefish are primarily carnivorous/generalized omnivores in the wild, grazing on small benthic invertebrates, sponge material, hydroids, algae, and other filamentous growths. In captivity, it is beneficial to make the bulk of the diet marine algae-based foods such as nori, dried seaweed, spirulina-enriched flakes, and high-quality herbivore or omnivore pellets, as these help provide steady nutrition and support natural browsing behavior. To ensure balanced nutrition, offer supplements such as mysis shrimp, enriched brine shrimp, finely chopped clam, and other small meaty seafoods in moderation. Feeding from a seaweed clip and scattering small portions through the tank encourages natural foraging and keeps the fish engaged. Small feedings multiple times daily are ideal, with careful attention to prevent overfeeding and maintain excellent water quality.

mysis shrimp brine shrimp algae marine flakes

Behavior Temperament, activity level, and interactions.

Temperament: Peaceful

Tassled Filefish are deliberate, midwater cruisers that spend much of their time hovering and picking through rockwork and macroalgae, so they do best in a spacious aquarium with ample hiding spots and a varied layout rather than open-water conditions. They are generally peaceful to mildly territorial, with most individuals tolerating tank mates well, though conspecifics may show tension unless kept in a very large system with strong visual barriers. A minimum tank size of about 75 gallons is recommended, with plenty of live rock, crevices, and broken sightlines to reduce stress and encourage natural foraging behavior. In mixed communities they usually coexist well with robust reef-safe species, but caution is warranted around very small invertebrates and particularly delicate corals, as some individuals may nip at polyps. Tassled Filefish are omnivores with a strong grazing tendency, feeding on filamentous algae, small crustaceans, zooplankton, and prepared meaty foods, and they should be offered a varied diet to maintain condition. They are best kept with calm, noncompetitive tank mates that will not outcompete them at feeding time.

Tank & Aquascape Tank requirements and aquascaping tips.

Min Tank Size: 50 gallons
Max Size: 6 inches
Care Level: Hard
Origin: Indo-Pacific

Compatibility Tank mates, aggression, and introduction order.

Temperament: Peaceful
Reef Safe: Yes

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

Reef Safe: Yes
Care Level: Hard

FAQs Answers to the most common questions.

Will a Tassled Filefish eat my coral, and which corals are most at risk?

Yes—most Tassled Filefish will nip at or fully consume soft corals and LPS, and many also pick at zoanthids, clove polyps, xenia, and fleshy Euphyllia. They’re especially risky in reef tanks because they naturally graze on coral tissue, polyps, and associated invertebrates. Even “reef-safe” individuals can suddenly start picking once settled in, so they’re best treated as coral predators, not coral-safe fish.

What do I feed a Tassled Filefish if I’m keeping it in captivity?

A mixed meaty diet is essential, with a strong emphasis on small live or frozen foods at first: enriched mysis, chopped shrimp, krill, clam, squid, copepods, and finely diced seafood. Many specimens also take prepared foods like frozen marine blends and sometimes pellets once trained. Frequent small feedings are usually better than one large meal, and offering food near natural picking surfaces often helps shy individuals start eating.

Is a Tassled Filefish safe with ornamental shrimp, crabs, and snails?

Not reliably. Tassled Filefish are opportunistic hunters and will often eat very small shrimp, tiny crabs, tube worms, feather dusters, and other delicate inverts if they can fit them in their mouth. Larger snails and robust crabs are less likely to be targeted, but they can still be harassed or picked at. If you want to keep ornamental invertebrates, this fish is a poor choice.

What tank size and aquascape does a Tassled Filefish need to thrive?

They do best in a spacious marine setup with lots of rockwork, hiding spots, and natural grazing surfaces. A mature tank is important because they are often shy at first and need stable water quality. The aquascape should include caves and overhangs, but still leave open swimming room. Since they can be slow and deliberate feeders, a tank with peaceful tankmates is usually better than an aggressive mixed community.

Why is my Tassled Filefish refusing food or staying hidden, and how do I get it eating?

This species is notorious for being stressed during transport and acclimation, and many individuals arrive thin or reluctant to feed. They often hide for days and may ignore dry food until they feel secure. Best results usually come from a very quiet tank, dim lighting at first, live or moving frozen foods, and feeding in the same area each time. Avoid aggressive tankmates, as bullying often suppresses feeding. If it still won’t eat after acclimation, it may need live foods and very stable water conditions before transitioning to prepared foods.

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.

The Tassled Filefish (Chaetodermis penicilligerus) is a uniquely camouflaged marine fish recognized for its shaggy appearance, mottled coloration, and flowing tassel-like appendages that help it blend into reef structures and algae-covered environments. Native to Indo-Pacific reefs, lagoons, and coastal rubble zones, this species relies heavily on camouflage and slow, deliberate movement to avoid predators.

Unlike many fast-moving reef fish, Tassled Filefish spend much of their time hovering slowly through rockwork and coral structures while searching for small invertebrates and benthic prey. Their unusual appearance and personality make them a highly interesting species for experienced aquarists.

Care Requirements

Care Level: Moderate to Advanced – Requires careful feeding and peaceful tank conditions
Minimum Tank Size: 75+ gallons
Aquarium Setup: Established aquarium with mature rockwork, calm hiding areas, and moderate flow

Tassled Filefish appreciate aquariums with natural rock structures, caves, and areas where they can blend into their surroundings. They are generally slow-moving fish that benefit from low-stress environments.

Diet & Nutrition

Tassled Filefish are carnivorous feeders that consume small benthic invertebrates and meaty foods in the wild.

Diet: Carnivore – Requires varied meaty foods
Recommended Foods:

Mysis shrimp
Finely chopped seafood
Clam and shrimp meat
Frozen carnivore blends
Enriched brine shrimp

Some specimens may initially be hesitant to accept prepared foods and may require patience during acclimation. Frequent feeding with a varied diet helps maintain healthy body weight.

Lifespan & Growth Rate

Lifespan: 5–8 years
Growth Rate: Slow to Moderate

With stable conditions and consistent nutrition, Tassled Filefish can become hardy long-term aquarium inhabitants.

Temperament & Compatibility

Temperament: Peaceful to Semi-Aggressive – Generally calm but may nip at certain invertebrates
Reef Safe? No (with caution)

Tassled Filefish may nip at soft corals, polyps, feather dusters, tube worms, and small ornamental invertebrates. Individual behavior varies significantly between specimens.

They are best housed with peaceful to moderately active tank mates that will not outcompete them during feeding.

Common Challenges & Considerations

Feeding Difficulties:
Some individuals can be slow to accept prepared foods after importation.

Coral & Invertebrate Nipping:
May graze on soft-bodied invertebrates and coral polyps in reef aquariums.

Timid Behavior:
Aggressive tank mates may stress this species and reduce feeding activity.

Camouflage Behavior:
Their cryptic coloration and slow movement often cause them to blend into the aquascape surprisingly well.

Water Conditions

Temperature: 75–77°F
dKH (Alkalinity): 8–9
pH: 8.1–8.3
Specific Gravity: 1.024–1.026

Stable water chemistry, low stress levels, and consistent feeding are important for maintaining healthy weight and long-term success with Tassled Filefish.