🥚 Pink Lady Sea Urchin (Salmacis sp.)
Marine Reef-Safe Collector Urchin • Colour-Changing Camouflage Species • Nano Tank Algae Grazer • Beginner-Friendly Reef Invertebrate
 
📋 The Pink Lady Sea Urchin (Salmacis sp.) is a small, distinctive marine invertebrate prized for its compact size, genuine algae-grazing usefulness, and a fascinating self-camouflaging habit — it actively collects and carries small stones, empty snail shells, and coral fragments on its spines to disguise itself from predators.
Native to reef and rubble zones across the Indian Ocean, particularly around Sri Lanka, Pink Lady Sea Urchins belong to the group of "collector urchins," a behavioural trait that also makes them an interesting, ever-changing visual feature in the tank as their camouflage selection shifts over time.
Naturally hardy and easy to keep, Pink Lady Sea Urchins start out pale white as juveniles, developing their signature pink colouration gradually as they mature. Individual foraging habits vary — some spend much of their time actively grazing algae across rock, while others (based on real keeper reports) may settle into the sand bed and sift there instead, particularly in tanks with heavier detritus buildup. Like all sea urchins, they must never be exposed to air, as this can be life-threatening.
With a stable, established reef tank and adequate algae supply, they thrive as a Compact Colour-Changing Nano Reef Cleanup Invertebrate.
 
💡 Highlights
🩷 Colour Transformation: Starts pale white as a juvenile, developing pink colouration with age
🐚 Natural Camouflage Behaviour: Actively collects shells, stones, and coral fragments to disguise itself
🌿 Genuine Algae Grazer: Feeds on nuisance algae, supporting natural tank cleanup
🌊 Reef Safe: Compatible with corals and most reef invertebrates
🧠 Ideal for Nano Tanks: Compact adult size suits smaller aquariums well