Common name: red cushion sea star

Scientific name: Oreaster reticulatus (Linnaeus, 1758)
sunset over the Atlantic Ocean in FloridaBottom of Red Cushion Sea Star (Starfish)
Underwater view of two red starfishes in blue water of Caribbean Sea, Saona island, Dominican Republic

General information

The Red Cushion Sea Star, Oreaster reticulatus, is a large and colorful echinoderm commonly found in the Caribbean. It is known for its distinctive pentagon shape and bright red to orange coloration, with a pattern of reticulations across its body. This species can grow quite large, making it a visually striking addition to spacious marine aquariums.

Details

Recommended minimum tank volume
500 liter (130 gallons)
Salinity
S.G. 1.022 to 1.025
Temperature
22 to 28 °C (72 to 82 °F)
Acidity
pH 8 to 8.4
Average size
50 cm (1′8″)
Care level
Moderate to easy Sensitive to water quality.
Diet
Omnivore Scavenges, eats detritus.
Reefsafe
No May disturb small inverts.
Aggression
Peaceful
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Echinoderms
    Echinodermata
  3. Class
    Starfish
    Asteroidea
  4. Order
    Starfish
    Valvatida
  5. Family
    Cushion Stars
    Oreasteridae
  6. Genus
    Cushion Sea Stars
    Oreaster
  7. Species
    red cushion sea star
    Oreaster reticulatus (Linnaeus, 1758)
  8. Synonyms
    Asterias gigas Linnaeus, 1753
    Asterias pentacyphus Retzius, 1805
    Asterias reticulata Linnaeus, 1758
    Asterias sebae de Blainville, 1830
    Oreaster aculeatus (Gray, 1840)
    Oreaster bermudensis H.L. Clark, 1942
    Oreaster gigas Lütken, 1859
    Oreaster lapidarius Grube, 1857
    Oreaster tuberosus Behn in Möbius, 1859
    Pentaceros aculeatus Gray, 1840
    Pentaceros gibbus Gray, 1840
    Pentaceros grandis Gray, 1840
    Pentaceros reticulatus Gray, 1840

Care

Caring for Oreaster reticulatus requires a large tank with a sandy bottom to mimic their natural habitat. They are omnivorous and can be fed a varied diet including meaty foods and algae. It's important to note that they may prey on small invertebrates and sessile organisms, so they should be kept with caution in a reef tank. Regular water changes and stable water parameters are crucial for their well-being.

Reproduction

In the wild, Oreaster reticulatus reproduces by releasing eggs and sperm into the water column, where fertilization occurs externally. In captivity, breeding is less common, but with optimal conditions, it's possible to observe spawning behavior.

Habitat

Oreaster reticulatus is typically found in shallow waters of the Caribbean Sea and the western Atlantic, from the Bahamas and Florida to Brazil. They inhabit seagrass beds, sandy bottoms, and coral reefs, often in areas with seagrass or macroalgae.