Common name: Red Knob Sea Star

Scientific name: Neoferdina insolita Livingstone, 1936
Underwater photography. Red knobbed sea star and sea urchins. Zanzibar, Tanzania.African red knob sea star
Red Knob Sea Star - (Protoreaster linckii)

General information

The Red Knob Sea Star, Neoferdina insolita, is a striking marine invertebrate known for its vibrant red coloration and prominent spines. It is a member of the family Goniasteridae, which includes sea stars with generally attractive appearances and interesting behaviors. This species is often sought after by reef aquarium enthusiasts for its beauty and the dynamic presence it can add to a tank.

Details

Recommended minimum tank volume
75 liter (20 gallons)
Salinity
S.G. 1.023 to 1.025
Temperature
24 to 27 °C (75 to 81 °F)
Acidity
pH 8.1 to 8.4
Average size
10 cm (4″)
Care level
Moderate to easy Sensitive to water quality
Diet
Omnivore Enjoys varied diet, including detritus
Reefsafe
Yes
Aggression
Peaceful
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Echinoderms
    Echinodermata
  3. Class
    Starfish
    Asteroidea
  4. Order
    Starfish
    Valvatida
  5. Family
    Sea Stars
    Goniasteridae
  6. Genus
    Sea Stars
    Neoferdina
  7. Species
    Red Knob Sea Star
    Neoferdina insolita Livingstone, 1936

Care

Caring for Neoferdina insolita requires a well-established aquarium with a stable environment. They need a sandy substrate and plenty of live rock to scavenge for microorganisms and detritus. It's important to note that they may prey on small invertebrates and can potentially harm small sessile animals, so they should be monitored in a reef tank setting. They are sensitive to sudden changes in water parameters, so maintaining consistent water quality is crucial.

Reproduction

In the wild, Neoferdina insolita reproduces by releasing gametes into the water column, a process known as broadcast spawning. In the aquarium, however, reproduction is rare. If conditions are optimal and a group of these sea stars is kept, spawning may occur, but raising the larvae to adulthood is challenging and seldom achieved by hobbyists.

Symbiosis

While Neoferdina insolita does not have any specific symbiotic relationships that are of particular interest to reefkeepers, its role in the aquarium as a scavenger helps maintain a clean environment by consuming detritus and uneaten food.

Habitat

Neoferdina insolita is found in the Indo-Pacific region, particularly around the East African coast and the Red Sea. They inhabit various reef environments, often seen on or near coral rubble and sandy substrates.