The Chocolate Chip Starfish (Protoreaster nodosus) is a unique and visually striking species of sea star, named for the dark, chocolate-colored spines that cover its body, resembling chocolate chips. They are relatively hardy and can be kept in home aquariums, but they do require specific care to thrive. Here’s a guide to caring for a Chocolate Chip Starfish:
1. Tank Requirements
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Tank Size: At least 30 gallons, but larger is better as these starfish can grow up to 12 inches in diameter.
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Water Parameters:
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Temperature: 72-78°F (22-26°C)
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pH: 8.1-8.4
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Specific Gravity: 1.023-1.025
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Ammonia, Nitrite, Nitrate: Ammonia and Nitrite should be 0 ppm; Nitrate should be as low as possible, ideally below 20 ppm.
2. Substrate and Tank Setup
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Substrate: Sandy or soft substrate is preferred as they like to move along the bottom of the tank.
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Live Rock: Provide plenty of live rock as they will graze on the biofilm and algae growing on it.
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Hiding Spots: Although not necessary, providing hiding spots can make the starfish feel more secure.
3. Diet
- Chocolate Chip Starfish are omnivores and scavengers. They will eat detritus, algae, and small invertebrates.
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Supplemental Feeding: Feed them a varied diet that can include chopped fish, shrimp, squid, and algae wafers. Feed every 2-4 days, depending on how much food is naturally available in the tank.
4. Compatibility
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Tank Mates: They are generally peaceful but can be a threat to small invertebrates like snails, clams, and corals. Avoid housing them with slow-moving or delicate corals.
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Reef Compatibility: Not reef-safe, as they may consume or damage corals and other sessile invertebrates.
5. Handling
- Handle with care; if you need to move the starfish, do so gently and try to minimize the time it is exposed to air.
6. Health and Monitoring
- Regularly check for signs of stress, such as a loss of limbs or unusual color changes.
- Maintain stable water parameters; sudden changes can stress the starfish.
7. Lifespan
- With proper care, Chocolate Chip Starfish can live for up to 10 years in captivity.
By maintaining a stable environment and providing a proper diet, your Chocolate Chip Starfish can thrive and be a fascinating addition to your marine aquarium.
