• General Overview

  • The Sand Sea Star (Astropecten species) is a fascinating marine invertebrate prized for its burrowing behavior and reef-safe nature.

  • Available at 8–15 cm, these medium-sized sea stars are ideal for established saltwater aquariums, providing natural substrate activity and interest.

  • Known for its graceful movement across sandy substrates, it adds both ecological and visual value to marine tanks.

  • Hardy and adaptable, it is suitable for hobbyists with some experience in marine aquariums.

• Appearance & Physical Characteristics

  • Classic star-shaped body with five arms radiating from a central disc.

  • Soft, sandy coloration—beige, tan, or light brown—helps it blend naturally into substrates.

  • Tube feet along the underside allow for smooth burrowing and movement.

  • Slightly pointed or tapered arms enhance digging efficiency.

  • Subtle patterns and natural texture give the aquarium a realistic, dynamic look.

• Behavior & Temperament

  • Peaceful and non-aggressive, making it reef-safe in most setups.

  • Spends much of its time buried or partially buried in sand, surfacing occasionally to feed.

  • Uses tube feet to capture detritus, small invertebrates, and leftover food.

  • Active mainly during night or low-light periods, adding natural activity to the tank.

  • Avoids confrontation; coexists peacefully with fish, corals, and invertebrates.

• Adult Size & Lifespan

  • Adult size: Up to 15–20 cm

  • Aquarium specimens often start at 8–15 cm.

  • Lifespan: 10+ years in well-maintained marine aquariums.

  • Slow growth and long-lived, making it a lasting addition to the tank.

• Tank Size & Aquarium Setup

  • Minimum tank size: 100 liters (25 gallons)

  • Requires a thick sandy substrate (at least 5–8 cm) to allow natural burrowing.

  • Avoid sharp rocks or decorations that could damage tube feet.

  • Moderate water flow preferred; too strong may dislodge it.

  • Provide live rock for structure, but ensure sufficient open sand for movement.

• Water Conditions (Marine Parameters)

  • Temperature: 24–27 °C

  • Salinity: 1.023–1.025 SG

  • pH: 8.1–8.4

  • Alkalinity: 8–12 dKH

  • Ammonia & Nitrite: 0 ppm

  • Nitrate: Below 10–20 ppm

  • Stability is critical—avoid sudden changes in temperature, salinity, or pH.

  • Weekly water changes of 10–20% help maintain health and substrate cleanliness.

• Feeding Habit & Diet

  • Omnivorous scavenger, primarily consuming detritus and microfauna in the sand.

  • Supplement diet with:

    • Finely chopped meaty foods (shrimp, fish, mollusks)

    • Specialized sea star or invertebrate pellets

    • Small live or frozen invertebrates

  • Feed 1–2 times weekly, ensuring food reaches the substrate.

  • Avoid overfeeding, as leftover food may pollute the tank.

• Tank Mates & Compatibility

  • Reef-safe with fish, corals, and most invertebrates.

  • Avoid co-housing with overly aggressive predators that may harm tube feet.

  • Safe with shrimp, snails, clams, and peaceful fish.

  • Best in aquariums with open sandy areas for natural movement and burrowing.

• Care Level & Maintenance

  • Care level: Intermediate

  • Requires established, stable aquariums with mature substrates.

  • Sensitive to poor water quality, sudden changes, and copper-based medications.

  • Minimal daily care—mainly monitoring water quality and occasional feeding.

• Health & Special Notes

  • Hardy if provided with stable parameters and proper substrate.

  • Tube feet are delicate—avoid rough handling or sharp surfaces.

  • Stress may cause withdrawal into sand or inactivity; stable conditions usually resolve this.

  • Avoid overcrowding the sand substrate to allow free movement.

• Why Choose Sand Sea Star (8–15 cm)?

  • Natural burrowing and substrate-cleaning behavior

  • Reef-safe and peaceful

  • Long-lived and hardy with proper care

  • Adds dynamic activity and natural aesthetics to marine tanks

  • Ideal for saltwater hobbyists who want ecological balance

The Sand Sea Star (8–15 cm) is an exceptional choice for marine aquarists looking for a peaceful, reef-safe, and behaviorally interesting invertebrate. With proper substrate, stable water parameters, and occasional feeding, this sea star will thrive and bring both movement and realism to any saltwater or reef aquarium.