Common name: purple seastar
General information
The Red Sea Star, Ophidiaster ophidianus, is a striking marine invertebrate known for its vibrant red coloration and five long, slender arms. This species is a part of the Ophidiasteridae family and is often sought after by reef aquarium enthusiasts for its beauty and the role it plays in the ecosystem.
Details
- Recommended minimum tank volume
- 200 liter (53 gallons)
- Salinity
- S.G. 1.023 to 1.026
- Temperature
- 22 to 26 °C (72 to 79 °F)
- Acidity
- pH 8 to 8.4
- Average size
- 30 cm (1′)
- Care level
- Moderate to easy
- Diet
- Omnivore
- Reefsafe
- Yes
- Aggression
- Peaceful
- Captive bred
- No
Taxonomy
- KingdomAnimalsAnimalia
- PhylumEchinodermsEchinodermata
- ClassStarfishAsteroidea
- OrderStarfishValvatida
- FamilyOphidiasteridae StarfishOphidiasteridae
- GenusRed Knob Sea StarOphidiaster
- Speciespurple seastarOphidiaster ophidianus (Lamarck, 1816)
- SynonymsAsterias ophidiana de Lamarck, 1816Ophidiaster aurantius Gray, 1840Ophidiaster canariensis Greeff, 1872
Care
Ophidiaster ophidianus requires a well-established reef tank with plenty of live rock and a sandy substrate to mimic its natural habitat. It is sensitive to water quality and requires stable conditions with low nitrate levels. The Red Sea Star is an omnivore and benefits from a varied diet including detritus, small invertebrates, and meaty foods.
Reproduction
Sea stars, including Ophidiaster ophidianus, have the ability to regenerate lost limbs, which is a form of asexual reproduction. In the wild, they also reproduce sexually by releasing gametes into the water column. In captivity, breeding is less common, but with optimal conditions, it is possible to observe spawning behavior.
Symbiosis
While not known for any specific symbiotic relationships, sea stars play a crucial role in the reef ecosystem by helping to control algae growth and providing a balance to the food web.
Habitat
Ophidiaster ophidianus is found in the Red Sea and the Western Indian Ocean. It prefers shallow waters and is often seen on coral reefs, where it can blend in with its surroundings and find ample food sources.