Amphiprion akindynos (Barrier Reef Clownfish)
• Small fish safe: ✅ Yes
• Small invert safe: ✅ Yes
• Coral safe: ✅ Yes
• Minimum tank size: 120L+ (preferably 150L+ for pairs or anemone hosting)
• Adult size: ~12 cm (4.7 inches)
• Diet: Omnivorous (marine pellets, flakes, frozen mysis/brine shrimp, and algae-based foods)
• Be aware of: Can be semi-aggressive, especially when hosting an anemone. Closely related to the Clarkii Clownfish but distinguished by its white tail and unique body markings.
Barrier Reef Clownfish (Amphiprion akindynos) – A Robust and Distinctive Anemonefish
The Barrier Reef Clownfish, also known as the Barrier Reef Anemonefish, is a striking and hardy species native to the Great Barrier Reef and surrounding waters, including New Caledonia and the Coral Sea. It is a larger clownfish species with bold markings, a white tail, and a strong personality, making it a great choice for aquarists looking for an active and resilient clownfish.
Appearance and Coloration
Barrier Reef Clownfish are easily recognizable due to their honey-brown to dark brown body with two bold white bands edged in black. The first white band is located just behind the eyes, while the second is positioned across the middle of the body. Unlike some of its relatives, its tail fin is white, providing a striking contrast to its darker body. The pectoral, anal, and pelvic fins are typically bright yellow to orange.
Juveniles tend to be lighter in coloration, and as they mature, their brown tones darken, giving them a richer, more defined appearance. As with all clownfish, females are larger and more dominant than males.
Natural Habitat and Behaviour
Barrier Reef Clownfish are endemic to the Great Barrier Reef, where they inhabit lagoon reefs, outer reef slopes, and sheltered reef environments. They:
• Form symbiotic relationships with anemones, particularly Bubble Tip Anemones (Entacmaea quadricolor) and Sebae Anemones (Heteractis crispa).
• Live in hierarchical social groups, with a dominant female, a breeding male, and subordinate non-breeding individuals.
• Defend their territory aggressively, especially when hosting an anemone.
In aquariums, they are active swimmers and will claim a rock formation or coral structure as their territory, even if an anemone is unavailable.
Tank Requirements and Water Parameters
Barrier Reef Clownfish are resilient and adaptable, but they require a stable, well-maintained environment with ample space.
• Minimum tank size: 120L+ (150L+ recommended for pairs or anemone hosting)
• Temperature: 24–27°C (75–81°F)
• pH: 8.1–8.4
• Salinity: 1.020–1.025
• Water movement: Moderate to strong
• Filtration: Good filtration and regular water changes are essential for maintaining water quality.
A tank with plenty of rock structures will provide hiding spots and security, reducing stress and territorial disputes.
Diet and Feeding
Barrier Reef Clownfish are omnivorous, requiring a varied diet for health and vibrant coloration.
Recommended foods include:
• High-quality marine pellets and flakes – Provides essential nutrients.
• Frozen mysis and brine shrimp – Excellent protein sources.
• Chopped seafood (shrimp, squid, or fish) – Occasional treats.
• Algae-based foods or spirulina – Supports digestion and immune function.
Feed 1-2 times per day, ensuring portions are small enough to prevent overfeeding and waste buildup.
Compatibility and Tank Mates
Barrier Reef Clownfish are semi-aggressive, particularly when defending a territory or anemone. They are less aggressive than Maroon Clownfish but can be territorial like Clarkii Clownfish.
Best tank mates include:
✔ Semi-aggressive fish such as Dwarf Angelfish, Wrasses, and Tangs.
✔ Hardy, active fish like Basslets, Blennies, and Dottybacks.
✔ Reef-safe invertebrates such as shrimp, snails, and crabs.
Avoid housing with:
❌ Other clownfish species, unless in an extremely large tank to prevent fighting.
❌ Small, timid fish (e.g., Firefish, small Gobies) that may struggle with their bold nature.
❌ Very aggressive species (e.g., Large Triggerfish, aggressive Damselfish) that may stress them out.
When keeping a pair, introduce them simultaneously to prevent territorial aggression.
Hosting Anemones
Barrier Reef Clownfish readily form symbiotic relationships with anemones, particularly:
• Bubble Tip Anemone (Entacmaea quadricolor)
• Sebae Anemone (Heteractis crispa)
• Magnificent Anemone (Heteractis magnifica)
• Carpet Anemones (Stichodactyla spp.)
⚠ Important Notes:
• Anemones require strong lighting (LEDs, metal halides, or T5s) and stable water conditions.
• Clownfish do not need an anemone to thrive.
• Anemones should only be kept by experienced aquarists.
Health and Disease Considerations
Barrier Reef Clownfish are hardy, but they can be prone to common saltwater diseases:
• Marine Ich (Cryptocaryon irritans) – Often triggered by stress or poor water quality. Quarantining new fish before introduction is recommended.
• Brooklynella (Clownfish Disease) – A parasite that causes heavy mucus production and difficulty breathing.
• Bacterial infections – Typically caused by poor water conditions or injuries.
To keep them healthy:
✔ Provide a varied diet rich in vitamins and marine algae.
✔ Ensure stable water parameters with regular maintenance.
✔ Quarantine new fish before adding them to the main tank.
Lifespan and Long-Term Care
With proper care, Barrier Reef Clownfish can live up to 10-15 years in captivity. Their bold personality, long lifespan, and unique coloration make them a great choice for aquarists looking for a hardy clownfish species.
Why Choose a Barrier Reef Clownfish?
✔ Honey-brown to dark brown body with bold white bands and a white tail – Distinctive appearance.
✔ Hardy and adaptable, making them ideal for beginner and intermediate aquarists.
✔ Can live long lives, up to 15 years in captivity.
✔ Will host anemones if available, but does not require one.
✔ More unique than the common Ocellaris or Percula Clownfish.
⚠ Important Considerations Before Buying a Barrier Reef Clownfish:
🚫 Can be territorial – Best kept singly or in a bonded pair.
🚫 Defends its territory aggressively, especially when hosting an anemone.
🚫 Requires a moderate to large tank – Needs swimming space and shelter.