Blue Linckia Starfish (Linckia laevigata) is one of the most iconic reef display invertebrates—instantly recognisable for its vivid blue colour and slow, graceful movement across rockwork and glass. It’s a peaceful, non-predatory starfish that can be a beautiful addition to established reef aquariums, but it’s also considered a more advanced species due to its specific feeding needs and sensitivity to handling and water quality.
Success with a Blue Linckia starts with the right environment: a large, mature reef tank with stable salinity and excellent overall water quality. They do best in systems that have been running for many months (often a year or more), where natural microfauna and biofilm are abundant. Avoid sudden parameter swings—especially salinity changes—and ensure temperature, alkalinity, and pH remain consistent. Blue Linckias are also prone to stress from exposure to air, so always keep them submerged during transfers.
Feeding is the main challenge. Blue Linckias graze continuously on natural films, sponges, and micro-organisms found on live rock, and many aquariums simply don’t produce enough of this long-term—especially in newer or ultra-clean systems. While some individuals may accept occasional supplemental offerings (such as small pieces of meaty food), most still rely primarily on natural grazing. For this reason, they’re best suited to well-established tanks with lots of live rock surface area and a healthy “living” reef ecosystem.
In terms of compatibility, they’re generally reef safe with corals and peaceful fish, and they won’t bother typical reef livestock. However, they can be vulnerable around aggressive crabs, large wrasses, puffers, triggers, or anything that may nip at tube feet. Also be mindful of mechanical hazards—protect them from uncovered pump intakes and overflows, as starfish can wander into places they shouldn’t.
Acclimation is critical: use a slow drip acclimation and take your time, as rapid changes in salinity or pH are a common cause of decline. A healthy Blue Linckia should appear full and firm, with intact tube feet and no signs of “melting,” lesions, or tissue breakdown. If you have a mature reef with stable parameters and plenty of natural grazing, the Blue Linckia Starfish can be an unforgettable, premium display inhabitant that adds real reef authenticity to your tank
