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Sand sifting starfish (Astropecten polyacanthus)
Photo: Nhobgood Nick Hobgood · CC BY-SA 3.0 via Wikimedia Commons

Sand sifting starfish

Astropecten polyacanthus · Astropectinidae

Also known as Sand sifting star

Intermediate

Turns the sand bed constantly, but strips it of micro-fauna and then starves in small tanks.

In short: A sand sifting starfish needs at least 300 L (79 US gal), water at 24–28 °C (75–82 °F) and pH 8.1–8.4. It is peaceful, usually kept singly, and rated intermediate to keep.

Minimum tank
300 L (79 US gal)
Temperature
24–28 °C (75–82 °F)
pH
8.1–8.4
Adult size
20 cm (7.9 in)
Group size
1+

Reef & marine husbandry

Specific gravity
1.024–1.026
Reef safety
Reef safe
With corals
Reef safe.
With inverts
Eats small snails and sand fauna.
Minimum in a mixed reef
300 L (79 US gal)
Minimum fish-only (FOWLR)
300 L (79 US gal)
Aggression
None.
Feeding
Spot-feed sinking food under the disc.

Care requirements

Minimum tank volume
300 L (79 US gal)
Temperature
24–28 °C (75–82 °F)
pH
8.1–8.4
Hardness
8–12 dGH
Lifespan
3–7 years
Diet
Detritivore/carnivore — sand fauna, sinking pellets, chopped seafood.
Care level
Intermediate

Origin & habitat

Native region
Indo-Pacific
Water type
Saltwater
Biotope
Open sand flats
Natural conditions
Large mature deep sand bed; very stable salinity; acclimate slowly.

Behaviour & stocking

Temperament
Peaceful
Minimum group
1 fish
Swims
Bottom
Good tank mates
Gobies
Clownfish
Tangs
Avoid
Small tanks
Puffers
Triggers

Breeding & difficulty

Breeding difficulty
Advanced
Sexing
Not sexable.
Notes
Not bred at home.
Common ailments
Starvation
Shock from salinity swings
Copper poisoning
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