Tridacna derasa, or the Derasa Clam, is a magnificent large clam species highly regarded in the marine aquarium hobby for its smooth, elongated shell and vivid mantle patterns. At 10cm, this clam is a manageable size for advanced hobbyists with established reef tanks.
Care Level: Moderate to advanced. Requires stable water parameters and strong lighting.
Feeding: Primarily photosynthetic, relying on symbiotic zooxanthellae within its mantle. Supplementary feeding with phytoplankton or specialised clam foods is recommended to support optimal health.
Lighting Requirements: High-intensity lighting such as metal halide, T5, or strong LED systems is essential to support photosynthesis.
Water Flow: Moderate, indirect water flow to prevent mantle damage while ensuring nutrient exchange.
Placement: Securely place on a stable substrate or rockwork in a well-lit area of the aquarium. Avoid direct strong currents and ensure it is not shaded by corals or rock structures.
Compatibility & Reef Safety: Reef safe with caution. Avoid housing with aggressive fish or invertebrates that may nip at the mantle. Suitable for reef tanks with peaceful tankmates.
Minimum Tank Size: 150 litres (40 US gallons) or larger to maintain stable water parameters and provide adequate space.
Origin: Indo-Pacific region.
Maximum Size: Up to 30cm in length under optimal conditions.
Regular water quality monitoring and stable parameters are critical for the health of Tridacna derasa. This clam adds a spectacular visual element to mature reef aquariums and benefits from careful husbandry and high-quality lighting.
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