Amphiprion polymnus (Saddleback 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: ~13 cm (5 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. Prefers to stay near the substrate and hosts sand-dwelling anemones like Haddon’s Carpet Anemone.
Saddleback Clownfish (Amphiprion polymnus) – A Unique and Bottom-Dwelling Clownfish
The Saddleback Clownfish is a distinctive, somewhat uncommon clownfish species named after its characteristic white “saddle” marking across its back. Unlike many other clownfish, Saddlebacks prefer to stay near the sand bed, often associating with sand-dwelling anemones. They are hardy, active, and entertaining, making them a great choice for aquarists looking for something different from the typical clownfish species.
Appearance and Coloration
Saddleback Clownfish have a unique and variable color pattern:
• A dark brown to black body, sometimes with a slight orange hue on the face.
• A large white “saddle” across their midsection, sometimes forming a complete band.
• A white headband behind the eyes, which is typical of many clownfish species.
• Bright orange or yellow fins, depending on their region of origin.
• Females are larger and more dominant, as clownfish are protandrous hermaphrodites (all start as males and can become females when needed).
There are regional variations, with some specimens showing more contrasting colors, while others have a softer gradient between their markings.
Natural Habitat and Behaviour
Saddleback Clownfish are found in the Indo-Pacific region, including Malaysia, Indonesia, and the Philippines. In the wild, they:
• Prefer to stay near sandy or muddy substrates, unlike other clownfish that hover around rock formations.
• Live symbiotically with sand-dwelling anemones, particularly Haddon’s Carpet Anemone (Stichodactyla haddoni).
• Are social within their group, but can be territorial toward other fish near their anemone.
In captivity, they do not require an anemone, but they will still claim a spot near the bottom of the tank, often hovering over soft corals, rocks, or artificial decorations.
Tank Requirements and Water Parameters
Saddleback Clownfish are fairly easy to care for, but they prefer a calm environment with plenty of open space near the substrate.
• 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 (not too strong, as they prefer gentle currents near the sand bed)
• Filtration: Good-quality filtration and regular water changes to maintain water quality
If keeping an anemone, provide a deep sand bed and stable lighting conditions.
Diet and Feeding
Saddleback Clownfish are omnivores, needing a varied diet for health and color vibrancy.
Recommended foods include:
• High-quality marine pellets and flakes – Provides essential nutrients.
• Frozen mysis and brine shrimp – Adds variety and protein.
• 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
Saddleback Clownfish are semi-aggressive, especially if they host an anemone. They are less aggressive than Maroon Clownfish but more territorial than Ocellaris or Percula Clownfish.
Best tank mates include:
✔ Peaceful to semi-aggressive tank mates such as Fairy Wrasses, Blennies, Gobies, and Basslets.
✔ Other peaceful clownfish varieties, if housed in a very large tank with enough space.
✔ Reef-safe invertebrates such as shrimp, snails, and small crabs.
Avoid housing with:
❌ More aggressive clownfish species (e.g., Maroon, Clarkii, or Tomato Clownfish), as they may bully Saddlebacks.
❌ Very aggressive fish (e.g., large triggerfish, aggressive dottybacks).
❌ Fast-moving or boisterous species that may stress them out.
If keeping a pair, introduce them at the same time to prevent disputes.
Hosting Anemones
Saddleback Clownfish have a strong preference for sand-dwelling anemones, particularly:
• Haddon’s Carpet Anemone (Stichodactyla haddoni)
• Long Tentacle Anemone (Macrodactyla doreensis)
⚠ 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
Saddleback Clownfish are hardy, but they can be vulnerable to:
• Marine Ich (Cryptocaryon irritans) – Common in stressed fish. Quarantining new fish before introduction is recommended.
• Brooklynella (Clownfish Disease) – A parasite that affects clownfish, causing heavy mucus buildup and difficulty breathing.
• Bacterial infections – Typically caused by poor water conditions or injuries.
To maintain good health:
✔ 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, Saddleback Clownfish can live up to 10-15 years in captivity. Their distinctive coloration, peaceful demeanor, and preference for sand-dwelling anemones make them a great choice for aquarists looking for a unique clownfish species.
Why Choose a Saddleback Clownfish?
✔ Bold black and white coloration with a unique “saddle” marking.
✔ More peaceful than other clownfish varieties, making them great for community tanks.
✔ Can live long lives, up to 15 years in captivity.
✔ Will host anemones if available, but does not require one.
✔ Hardy and adaptable, making them great for beginners and advanced aquarists alike.
⚠ Important Considerations Before Buying a Saddleback Clownfish:
🚫 Prefers sandy areas and may not use rock formations as much as other clownfish.
🚫 Territorial when hosting an anemone, but not as aggressive as Maroon or Clarkii Clownfish.
🚫 Not as common in the trade, so availability may vary.