Sand Sifting Starfish - Astropecten polycanthus
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The Sand Sifting Starfish (Astropecten polycanthus) is an active and intriguing echinoderm, known for its sand-sifting behavior that helps keep substrate clean. This peaceful starfish is a captivating addition to reef aquariums, providing natural substrate maintenance and visual interest.
Common Name: Sand Sifting Starfish
Scientific Name: Astropecten polycanthus
Family: Astropectinidae
Size: Up to 6 inches (15 cm) arm span
Temperament: Peaceful
Difficulty: Moderate
Reef Safe: Yes
Native Region: Found throughout the Indo-Pacific, typically inhabiting sandy areas near coral reefs and seagrass beds.
Tank Size: Minimum of 30 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Fine sand or sand/rubble mix to allow natural burrowing and foraging.
• Substrate Maintenance: Actively sifts sand while searching for detritus and small invertebrates, helping maintain clean substrate.
• Behavior: Peaceful; spends most of its time partially buried in sand.
• Diet: Carnivorous—feeds on small invertebrates, detritus, and organic matter in the sand.
• Tankmates: Compatible with most reef fish and invertebrates; avoid large predatory species that may harm the starfish.