Common name: Red starfish

Scientific name: Echinaster sepositus (Retzius, 1783)

General information

The Red Starfish, or Echinaster sepositus, is a striking marine invertebrate commonly found in the aquarium trade. Its vibrant red coloration and distinctive five-armed shape make it a visually appealing addition to any reef tank. This species is known for its relatively slow movement and its role in the natural control of algae within the aquarium ecosystem.

Details

Recommended minimum tank volume
100 liter (26 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
20 cm (8″)
Care level
Moderate to easy Sensitive to water quality.
Diet
Omnivore Enjoys varied diet, including meaty foods.
Reefsafe
Yes
Aggression
Peaceful
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Echinoderms
    Echinodermata
  3. Class
    Starfish
    Asteroidea
  4. Order
    Spinulosida
    Spinulosida
  5. Family
    Echinasteridae
    Echinasteridae
  6. Genus
    Red Sea Star
    Echinaster
  7. Species
    Red starfish
    Echinaster sepositus (Retzius, 1783)
  8. Synonyms
    Asterias rubens Olivi, 1792
    Asterias sagena Retzius, 1805
    Cribrella oculata Russo, 1893
    Cribrella seposita Dujardin & Hupé, 1862
    Echinaster sagenus (Retzius, 1805)
    Echinaster sanguinolentus Müller & Troschel, 1842
    Rhopia seposita (Lamarck, 1816)
    Stellonia seposita Nardo, 1834

Care

Echinaster sepositus requires a well-established aquarium with plenty of live rock and a stable environment. They are sensitive to changes in water quality, so maintaining pristine conditions is crucial. They feed on detritus, small organisms, and film algae, making them beneficial for tank cleanliness. Supplemental feeding with finely chopped meaty foods and marine-based flake or pellet food can be beneficial.

Reproduction

In the wild, Echinaster sepositus reproduces both sexually and asexually. In aquariums, sexual reproduction is rare, but they can regenerate lost limbs, and in some cases, these limbs can grow into new individuals. This process can be fascinating to observe but should be monitored to prevent overpopulation.

Habitat

The Red Starfish is native to the Mediterranean Sea and the Eastern Atlantic, from the coasts of Portugal to the Gulf of Guinea. It typically inhabits rocky substrates and seagrass beds, often found at depths ranging from shallow waters to about 200 meters.