Adding Them to New Aquariums

Immature aquariums often lack the biofilm, microbial life, and natural food sources required for long-term success.

Assuming They Are Completely Reef Safe

Some Biscuit Starfish may consume sponges, sessile invertebrates, tube worms, or other slow-moving organisms as they mature.

Acclimating Them Too Quickly

Starfish are extremely sensitive to changes in salinity, temperature, and water chemistry. Slow acclimation is critical for success.

Are Biscuit Starfish reef safe?

Biscuit Starfish are generally considered reef safe with caution. While many coexist peacefully in reef aquariums, some individuals may feed on sponges, tube worms, soft-bodied invertebrates, and other sessile organisms.

What does a Biscuit Starfish eat in a marine aquarium?

Biscuit Starfish consume detritus, biofilm, microbial growth, organic matter, and small invertebrates found on live rock and substrate. They may also accept meaty marine foods when offered.

Why is my Biscuit Starfish losing an arm?

Arm loss is commonly associated with stress, poor acclimation, unstable water parameters, injury, or starvation. Water quality issues should always be investigated if tissue damage is observed.

Can a Biscuit Starfish regenerate lost arms?

Yes. Healthy Biscuit Starfish are capable of regenerating damaged or lost limbs over time, although the process can take many months depending on the extent of the injury.

How long should a reef tank be established before adding a Biscuit Starfish?

Most experienced aquarists recommend waiting at least 6–12 months before introducing starfish to ensure the aquarium contains sufficient biological maturity and natural food sources.

Why is my Biscuit Starfish staying in one spot?

Starfish naturally move slowly and may remain in feeding areas for extended periods. However, prolonged inactivity can also indicate stress, poor water quality, or a lack of available food.

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Aquamarine Aquaristic

Biscuit Starfish (Goniodiscaster spp.)

Name: Biscuit Starfish (Goniodiscaster spp.)
Brand: Aquamarine Aquaristic
SKU: 47328925253878
Price: 65.0 AUD
Availability: OutOfStock

$65.00 each

Out of stock

Biscuit Starfish (Goniodiscaster spp.) Description The Biscuit Starfish is a striking and hardy sea star recognised for its thick, rounded body and distinctive pentagonal shape. Available in a variety of...

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Description

Biscuit Starfish (Goniodiscaster spp.) Description

The Biscuit Starfish is a striking and hardy sea star recognised for its thick, rounded body and distinctive pentagonal shape. Available in a variety of colours including red, orange, cream, and mottled patterns, this species is a popular choice for marine aquariums due to its unique appearance and relatively robust nature compared to many other starfish. Biscuit Starfish spend much of their time slowly moving across rockwork and substrate searching for food. While often considered reef safe with caution, they are best suited to mature aquariums with stable water quality and abundant natural food sources.

Shipping To Tasmania	NO
Shipping To Western Australia	NO

Husbandry

Care guide

Care difficulty

BeginnerModerateExpert

Moderate

Temperament

SkittishPeacefulSemi-agg.Aggressive

Peaceful

Maximum size 20cm

0 cm 15 cm 30 cm

Recommended Stocking

200 Litres

Reef safe

With caution

Diet

Omnivore & Scavenger – Biscuit Starfish feed on detritus, biofilm, organic matter, small sessile invertebrates, sponges, microbial growth, and meaty foods found on rockwork and substrate. In captivity, they may accept pieces of prawn, mussel, clam, fish flesh, and other marine-based foods. Mature aquariums with established live rock provide the best long-term feeding opportunities.

Avoid these pitfalls

Common mistakes to avoid

Learn from these common pitfalls when caring for marine livestock.

Immature aquariums often lack the biofilm, microbial life, and natural food sources required for long-term success.
Some Biscuit Starfish may consume sponges, sessile invertebrates, tube worms, or other slow-moving organisms as they mature.
Starfish are extremely sensitive to changes in salinity, temperature, and water chemistry. Slow acclimation is critical for success.

Help centre

Frequently asked questions

Find answers to common questions about our products and shipping.

Biscuit Starfish are generally considered reef safe with caution. While many coexist peacefully in reef aquariums, some individuals may feed on sponges, tube worms, soft-bodied invertebrates, and other sessile organisms.
Biscuit Starfish consume detritus, biofilm, microbial growth, organic matter, and small invertebrates found on live rock and substrate. They may also accept meaty marine foods when offered.
Arm loss is commonly associated with stress, poor acclimation, unstable water parameters, injury, or starvation. Water quality issues should always be investigated if tissue damage is observed.
Yes. Healthy Biscuit Starfish are capable of regenerating damaged or lost limbs over time, although the process can take many months depending on the extent of the injury.
Most experienced aquarists recommend waiting at least 6–12 months before introducing starfish to ensure the aquarium contains sufficient biological maturity and natural food sources.
Starfish naturally move slowly and may remain in feeding areas for extended periods. However, prolonged inactivity can also indicate stress, poor water quality, or a lack of available food.