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Derasa Clam (Tridacna derasa)

Find Derasa Clam across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified invertebrate listings before you buy.

Derasa Clam
Photo: (c) Sarah Boyle, all rights reserved, uploaded by Sarah Boyle
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Where to buy Derasa Clam

ReefDock searches the following reef retailers for this invertebrate. Click through to see the live price.

  • Saltwaterfish

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  • Amazon

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  • Petco

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About Derasa Clam

A large, heavy-shelled clam with a smooth cream, tan, or golden exterior shell that may display subtle growth ridges. The fluted interior reveals vibrant mantle tissue in shades of green, yellow, pink, or orange with contrasting darker bands or patterns.

Key facts

Diet Details
Filter-feeder consuming phytoplankton and zooplankton. Requires strong indirect water flow; also photosynthesizes via zooxanthellae symbionts for supplemental nutrition.
Appearance Description
A large, heavy-shelled clam with a smooth cream, tan, or golden exterior shell that may display subtle growth ridges. The fluted interior reveals vibrant mantle tissue in shades of green, yellow, pink, or orange with contrasting darker bands or patterns.
Notes
• Minimum 75 gallon tank with strong lighting (10,000+ K, PAR 200–400) • Requires stable conditions: 74–82°F, pH 8.1–8.3, and salinity 1.023–1.025 • Position on stable rockwork or sand bed away from aggressive fish and high-flow areas • Benefits from direct lighting exposure to sustain symbiotic zooxanthellae
Care Level
Moderate
Category
Clam
Compatibility
Peaceful filter-feeder; incompatible with aggressive snails, crabs, and triggerfish that may pry or crush shells. Safe with most fish and non-predatory inverts.
Origin
Indo-Pacific from Indonesia and Philippines south to Australia and east to the Solomon Islands, primarily in warm shallow reef lagoons.
Type
Clam
Max Size
16
Min tank size
75 gallons
Water Parameters
Temperature: 74-82°F pH: 8.1-8.3 Salinity: 1.023-1.025
Family
Cardiidae

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell invertebrates directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current invertebrates listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible invertebrate listings — so you can see the conditions a invertebrate was raised in before you buy. Log this invertebrate on Reef Trak.

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