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Description
Tongue Hard Coral Polyphyllia SpTongue Hard Coral (Polyphyllia sp.)(Also known as Tongue Coral, Carpet Coral, or Slipper Coral) OverviewThe Tongue Hard Coral (Polyphyllia sp.) is a unique and visually striking large polyp stony (LPS) coral, named for its elongated, tongue shaped body and fleshy, carpet like surface covered with small, waving polyps. Typically found in shades of tan, brown, green, or grey, many specimens develop fluorescent highlights under actinic lighting, creating
Tongue Hard Coral (Polyphyllia sp.)(Also known as Tongue Coral, Carpet Coral, or Slipper Coral)
OverviewThe Tongue Hard Coral (Polyphyllia sp.) is a unique and visually striking large-polyp stony (LPS) coral, named for its elongated, tongue-shaped body and fleshy, carpet-like surface covered with small, waving polyps. Typically found in shades of tan, brown, green, or grey, many specimens develop fluorescent highlights under actinic lighting, creating a subtle yet captivating display. The coral’s free-living nature and undulating movement across the substrate make it a fascinating addition to reef aquariums. Hardy, adaptable, and peaceful, Polyphyllia is suitable for both novice and experienced aquarists seeking a distinctive bottom-dwelling coral.
OriginNative to the Indo-Pacific region, including the Great Barrier Reef, Coral Sea, Fiji, Tonga, Indonesia, and the Maldives. Commonly found on sandy reef flats, lagoon floors, and lower reef slopes, where it lies unattached and moves slightly with water flow.
FeedingThe Tongue Coral is photosynthetic, deriving most of its energy from zooxanthellae in its tissue. It also benefits from supplemental feeding to promote growth and coloration. Feed 1–2 times per week with:
- Mysis or finely chopped seafood
- Marine plankton or LPS coral foods
- Coral pellets or powdered blends
Feed when tentacles are extended (usually at night or under reduced flow).
LightingLow to moderate lighting. Provide diffused illumination from LED, T5, or hybrid systems.
- PAR range: 75–150 ¬µmol/m¬≤/s
- Avoid strong, direct light which can cause bleaching or tissue retraction.
- Blue-spectrum lighting enhances fluorescence and subtle coloration.
Low to moderate, indirect flow. Gentle, variable currents help keep the coral free of debris without disturbing its position. Too much flow may prevent the tissue from expanding fully or cause damage to its soft underside.
Placement- Place on the sandy substrate or a flat, open area of the aquarium floor.
- Do not wedge or glue to rockwork — Polyphyllia is a free-living coral and can slowly move to find suitable conditions.
- Allow 10–15 cm (4–6 inches) of space between neighbouring corals to avoid stings or crowding.
- Avoid sharp rock edges beneath the coral, which can damage its soft tissue.
Reef safe. Compatible with:
- Peaceful reef-safe fish (gobies, tangs, wrasses, clownfish, etc.)
- Shrimp, snails, and hermit crabs
- Other non-aggressive LPS or soft corals
Avoid:
- Aggressive corals (e.g., Galaxea, Euphyllia, Hydnophora) in close proximity
- Butterflyfish, large angelfish, or puffers that may nip the coral’s fleshy surface
Peaceful.Polyphyllia has weak defensive tentacles and is easily damaged by aggressive neighbours. It does not actively sting other corals, making it an excellent community LPS.
Experience LevelBeginner to intermediate. The Tongue Coral is hardy and adaptable but requires stable water chemistry and gentle handling. It’s ideal for aquarists looking to add a unique, bottom-dwelling LPS coral to their reef system.
Water Parameters- Temperature: 24–27°C (75–81°F)
- pH: 8.1–8.4
- Salinity: 1.024–1.026 SG
- Alkalinity (dKH): 8–12
- Calcium: 400–450 ppm
- Magnesium: 1250–1350 ppm
- Nitrate: <10 ppm
- Phosphate: <0.03 ppm
- Tank Size: Minimum 100 litres (25 gallons) for small specimens; larger systems preferred for mature colonies
Consistent calcium, alkalinity, and nutrient stability will ensure long-term health and colouration.
Reef CompatibilityFully reef safe. The Tongue Hard Coral adds an organic, natural feel to reef aquariums. Its unusual shape and movement make it a standout piece on the sandbed, while its peaceful nature ensures compatibility with a wide variety of tank mates.
Interesting Fact
Unlike most corals, Polyphyllia corals are mobile — capable of slowly moving across the substrate using their soft tissue and subtle water pressure changes to reposition themselves for optimal light and flow.
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