Biscuit Starfish

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The Biscuit Starfish is an unusual and eye-catching marine invertebrate with a broad, flattened body and distinctive star-shaped appearance. It makes an interesting addition to larger marine aquariums and spends much of its time moving slowly across rockwork and substrate while searching for food.

Biscuit Starfish are generally peaceful and can be suitable for reef aquariums, although their exact care and diet can vary depending on the species sold under this common name. They benefit from a mature aquarium with established rockwork and plenty of natural food sources.

As with other starfish, stable salinity and careful acclimation are particularly important.

Quick Care Guide

• Scientific Name: Goniasteridae sp.
• Difficulty: Moderate
• Lighting: Low to moderate
• Flow: Moderate
• Temperature: 24–27°C
• Salinity: 1.024–1.026 SG
• Diet: Detritus, microorganisms and available organic matter
• Minimum Aquarium: 100L+
• Placement: Rockwork and substrate
• Temperament: Peaceful
• Reef Compatibility: Generally reef compatible
• Tank Maturity: Mature aquarium recommended

FAQ

What does a Biscuit Starfish eat?

Depending on the species, they may feed on microorganisms, detritus and organic material found throughout the aquarium.

Is a Biscuit Starfish reef safe?

Generally, yes. However, exact behaviour and dietary requirements can vary between species.

Can I keep one in a new aquarium?

A mature aquarium is strongly recommended, as established systems provide a more reliable natural food source.

Are Biscuit Starfish difficult to keep?

They are generally considered more sensitive than many common clean-up crew animals. Stable water parameters and careful acclimation are important.

Common Mistakes

Adding one to an immature aquarium

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

Rapid acclimation

Starfish can be sensitive to sudden changes in salinity. Use a careful acclimation process.

Allowing salinity to fluctuate

Stable salinity is particularly important for echinoderms.

Assuming all Biscuit Starfish have identical care requirements

The common name can be applied to different species, so specific identification is important when determining diet and compatibility.

Handling roughly

Avoid lifting or exposing starfish unnecessarily during aquarium maintenance.