Duncan Coral

The Duncan Coral (Duncanopsammia axifuga), often called Duncanopsammia or Whisker Coral, is one of the most popular LPS corals in the reef aquarium hobby. Native to the Indo-Pacific region, particularly Australia, this coral is known for its long, flowing tentacles and vibrant coloration, making it a stunning centerpiece in marine aquariums.

Duncan Coral forms colonies of branching skeletons with large fleshy polyps that extend outward during the day. Each polyp features a circular mouth surrounded by numerous soft tentacles that gently sway in the water current. The coral typically displays bright green, neon lime, or teal coloration, often contrasted with lighter or yellowish centers, especially under blue reef aquarium lighting.

One of the reasons Duncan Coral is so beloved among reef aquarists is its hardiness and relatively easy care requirements. Compared to many other LPS corals, Duncanopsammia adapts well to a variety of aquarium conditions and is considered suitable for both beginner and experienced reef keepers.

Duncan Coral thrives best under moderate lighting and gentle to moderate water flow. Excessively strong flow can cause the polyps to retract, while insufficient flow may allow debris to accumulate around the coral’s base. Proper water movement helps deliver nutrients and oxygen while keeping the coral clean.

As a photosynthetic coral, Duncan Coral receives much of its energy from symbiotic zooxanthellae algae living within its tissue. However, it also benefits from target feeding. Many reef aquarists feed Duncan corals small foods such as mysis shrimp, brine shrimp, reef roids, or finely chopped seafood. Regular feeding can significantly increase growth rates and polyp expansion.

Maintaining stable water chemistry is essential for healthy skeletal growth. Ideal reef parameters include:

• Calcium: 400–450 ppm

• Alkalinity: 8–9 dKH

• Magnesium: 1250–1350 ppm

• Temperature: 24–26°C (75–79°F)

• Moderate nutrient levels (low nitrate and phosphate)

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Duncan Coral is generally peaceful and reef safe, making it an excellent choice for mixed reef aquariums. Unlike some aggressive LPS corals, Duncanopsammia has relatively short sweeper tentacles and typically does not harm nearby corals when given reasonable spacing.

Another appealing feature of Duncan Coral is its fast growth compared to many other LPS species. New heads form at the base of existing polyps, gradually creating large branching colonies over time. Because of this growth pattern, Duncan Coral is also easy to frag and propagate, making it a favorite among reef hobbyists who enjoy coral propagation.

With its flowing tentacles, vibrant color, and hardy nature, the Duncan Coral is one of the most rewarding LPS corals to keep in reef aquariums, providing movement, color, and natural beauty to any marine aquascape.