Description
Squamosa Clam (Tridacna squamosa)
The Squamosa Clam, also known as the Fluted Giant Clam, is a beautiful photosynthetic giant clam recognised by its large, distinctive scutes (leaf-like shell projections) and colourful mantle. Its mantle can display shades of blue, green, brown, gold and purple, often with intricate patterns. It is generally considered one of the more adaptable giant clam species for reef aquariums, although it still requires strong lighting, stable water parameters and good water quality
.Lighting
Moderate to High: Requires good lighting to support its symbiotic zooxanthellae.
Performs well under quality reef LED or T5 lighting.
Can tolerate somewhat lower light than Maxima and Crocea clams.
Acclimate gradually when increasing light intensity.
Placement (Aquarium Zone)
Lower to Middle Rockwork: Can be placed on stable rockwork or a firm sandy area.
Unlike Maxima and Crocea clams, it does not need to be tightly embedded in rock.
Provide enough room for its mantle to expand without touching neighbouring corals.
Ensure the clam is stable and cannot be overturned.
Temperature
- 24–27°C (75–81°F)
Salinity
- 1.024–1.026 specific gravity
pH
- 8.1–8.4
Alkalinity
- 8–9 dKH
Calcium
- 400–450 ppm
Magnesium
- 1,250–1,400 ppm
Flow
Low to Moderate: Prefers gentle, indirect water movement.
Avoid strong direct flow that causes the mantle to retract or remain disturbed.
Maintain sufficient circulation for gas exchange and nutrient delivery.
Diet
Photosynthetic Filter Feeder: Obtains most of its energy from symbiotic zooxanthellae within its mantle.
Also filters microscopic plankton and suspended organic particles from the water.
Smaller specimens may benefit from supplemental phytoplankton or appropriately sized filter-feeder foods.
Larger specimens generally rely more heavily on photosynthesis.
Adult Size (up to)
- Approximately 40–50 cm (16–20 inches), with some wild specimens growing larger.
Growth Rate
- Moderate: Growth depends on lighting, nutrition, calcium availability, alkalinity and stable water conditions.
Care Level
Moderate to Advanced: Generally more adaptable than Maxima and Crocea clams, but still requires a mature aquarium and stable reef conditions.
Reef Compatibility
Reef Safe: Generally compatible with corals and other peaceful reef inhabitants.
Its mantle can be irritated by neighbouring corals or aggressive fish.
Vulnerable to pyramidellid snails, certain fish and other clam predators.
Temperament
Peaceful and Stationary: Usually remains in one location once settled.
Can retract its mantle and close its shell quickly when disturbed.
Special Requirements
Provide stable lighting and consistent calcium, alkalinity and magnesium levels.
Inspect regularly for pyramidellid snails, particularly around the shell edges and mantle.
Allow sufficient space for its large shell and mantle as it grows.
Avoid placing it near aggressive corals or animals that may irritate its mantle.
Do not forcibly remove it once attached; damage to its byssal threads can cause serious injury.
Maintain excellent water quality and avoid sudden changes in salinity or temperature.
