Spiny "Ninja Star" Star Snail

Spiny Star Snail (Astraea phoebia / Lithopoma phoebium): The Spiny Star Snail is a hardy, algae‑grazing marine snail known for its distinctive spiked shell and excellent cleanup‑crew performance. Its rugged appearance and strong grazing ability make it a favorite for reef aquariums needing reliable control of film algae, diatoms, and early nuisance growth. Appearance Spiny Star Snails have a thick, conical shell covered in natural spines and ridges, giving them a star‑like silhouette. Coloration ranges from tan to gray, often with subtle green or brown algae tones from grazing. Adult size typically reaches 1–2 inches, making them compact but effective workers. Natural Habitat Native to the Caribbean and Western Atlantic, including Florida, the Bahamas, and the Gulf of Mexico. They inhabit: Rocky reef zones Coral rubble fields Algae‑rich shallow areas Their spined shells help protect them from predators and provide leverage while grazing. Aquarium Requirements Spiny Star Snails are hardy and adaptable, thriving in most reef systems. Minimum tank size: 10 gallons Aquascape: Rockwork with plenty of grazing surfaces Water quality: Stable reef parameters; sensitive to sudden salinity changes Lid: Not required — they do not climb out They are slow but persistent grazers, ideal for long‑term algae management. Diet & Feeding These snails are strict herbivores, feeding on: Film algae Diatoms Green algae Biofilm on rock and glass They do not require supplemental feeding in well‑established tanks, but can be offered nori if natural algae is limited. Temperament & Compatibility Completely peaceful Reef‑safe with corals and inverts Safe with all fish May accidentally knock over loose frags due to their shell shape They do not prey on other snails or invertebrates. Why They Stand Out Excellent natural algae grazers Hardy and long‑lived Unique spiny shell adds visual interest Ideal for nano and large reef systems alike