Cushion Starfish

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The Cushion Starfish is a unique and eye-catching marine invertebrate with a thick, rounded body and short, reduced arms. Its unusual appearance makes it a fascinating addition to a large, established marine aquarium.

Cushion Starfish are generally slow-moving and spend their time travelling across rockwork and the substrate while searching for food. They are best suited to mature aquariums with established natural food sources and should be acclimated carefully, as starfish can be sensitive to sudden changes in water chemistry.

Provide plenty of mature live rock, natural growth and a stable environment for long-term success.

Quick Care Guide

• Scientific Name: Culcita spp.
• Difficulty: Moderate
• Lighting: Low to moderate
• Flow: Moderate
• Temperature: 24–27°C
• Salinity: 1.024–1.026 SG
• Diet: Detritus, microorganisms and other available organic foods
• Minimum Aquarium: 150L+
• Placement: Rockwork and substrate
• Temperament: Generally peaceful
• Reef Compatibility: Use caution; may consume or disturb some sessile invertebrates
• Tank Maturity: Mature aquarium strongly recommended

FAQ

What does a Cushion Starfish eat?

Its diet can include microorganisms, detritus and other organic material available throughout a mature aquarium. Supplemental foods may also be required.

Is a Cushion Starfish reef safe?

They are generally peaceful, but Culcita starfish can be opportunistic feeders and may consume or disturb some corals and other sessile invertebrates. Caution is recommended in reef aquariums.

Can I keep one in a new aquarium?

No. A mature aquarium is strongly recommended because established systems provide a more reliable natural food supply.

How large can Cushion Starfish become?

They can become considerably larger than many common aquarium starfish, so provide adequate aquarium space as the specimen grows.

Common Mistakes

Adding one to an immature aquarium

New systems may not contain enough natural food to support a starfish long term.

Assuming it is completely reef safe

Cushion Starfish can be opportunistic feeders and may interact with corals or other sessile invertebrates.

Rapid acclimation

Starfish are sensitive to sudden changes in salinity and water chemistry. Use a slow, careful acclimation process.

Handling it roughly

Avoid unnecessary handling and never expose the starfish to air unnecessarily.

Allowing poor water quality

Stable salinity, temperature and overall water quality are essential for long-term health.