Blue Linckia Sea Star (Linckia laevigata) Care Guide
Linckia laevigata is a bright blue Indo-Pacific sea star, sensitive in captivity and requiring a large mature reef tank and slow acclimation.
Compiled by Aquairi from published sources · Published · Updated
Overview
Linckia laevigata is a sea star of the family Ophidiasteridae, well known for its vivid blue colour, though morphs range from pure blue to dark or light blue with occasional aqua, purple, or orange tones. It is one of the more demanding invertebrates in the marine hobby, requiring stable conditions, a large mature reef tank, and a rich supply of film algae and detritus.
Taxonomy
- Class: Asteroidea
- Order: Valvatida
- Family: Ophidiasteridae
- Genus: Linckia
- Scientific name: Linckia laevigata
- Authority: (Linnaeus, 1758)
Habitat
The species inhabits shallow waters of the tropical Indo-Pacific, living on coral reefs and seagrass beds over sandy or hard substrates. It moves slowly, with a recorded mean locomotion rate of about 8.1 cm per minute. Arms are rounded at the tips and the tube feet are yellowish.
Tank requirements
- Minimum tank volume: 300 L
- Temperature: 24-26 °C (75-79 °F)
- pH: 8.1-8.4
- Salinity: 1.024-1.026 SG
- dKH: 8-11
- Size: 15-30 cm in diameter
- Lifespan: 5-10 years
- Acclimation: slow drip acclimation is essential
Diet
Linckia laevigata is generally a detritivore. It grazes throughout the tank for organic films and low-growing sedentary organisms such as sponges and algae, and aquarium specimens have been observed consuming Asterina sea stars. Because it depends on continuous grazing of biofilm, only a large, mature system with ample live rock can sustain it.
Compatibility
Peaceful and reef-safe with fish. It is parasitized by the snail Thyca crystallina and preyed upon by pufferfish, triton shells, harlequin shrimp, and anemones, so these should be avoided as tankmates.
Reproduction
The species has strong regenerative capacity and defensive autotomy. It has not yet been bred in captivity.
Linckia laevigata Breeding Guide: Why It Is Not Home-Bred
Overview
Linckia laevigata, the blue sea star, belongs to the order Valvatida, family Ophidiasteridae. It lives in shallow waters of the tropical Indo-Pacific, on coral reefs and seagrass beds. It is among the most recognisable reef sea stars but is notoriously sensitive in captivity.
Reproductive Mode
Like most starfish, Linckia laevigata is gonochoric and reproduces sexually by free spawning: eggs and sperm are released into the water, and the resulting embryos and larvae live as plankton. The larvae pass through bilaterally symmetrical bipinnaria and brachiolaria stages before settling and metamorphosing into juveniles.
Asexual Propagation
Sources note that L. laevigata may be able to reproduce asexually, although this remains poorly documented. The species shows regenerative capacity through autotomy (defensive arm loss), and many wild individuals are seen missing arms or in the comet form. Its congener Linckia multifora is confirmed to produce comets, so blue Linckia is presumed to fragment similarly, but this is not a controllable aquarium technique.
Common Challenges
Captive reproduction is not achieved because the planktonic larvae require open-water dispersal, specific microalgal food and conditions that home systems cannot supply. Beyond breeding, the species itself is difficult to keep alive: it demands a large, mature reef with abundant film algae and detritus and slow drip acclimation.