The Spiny Astrea Snail (Lithopoma tectum / Astraea spp.) is a highly effective and visually distinctive member of the marine clean-up crew, valued for both its algae-eating ability and unique shell structure.
Easily recognised by its rugged, pointed shell covered in small spines, this snail adds texture and character to any reef aquarium. Its natural colouring of greys, browns, and muted tones allows it to blend into rockwork while still standing out due to its unusual shape.
Spiny Astrea Snails are excellent herbivores, constantly grazing on film algae, diatoms, and early-stage nuisance algae found on rockwork and aquarium glass. Their steady feeding helps maintain a cleaner tank and prevents unwanted algae from taking hold, making them a practical and popular choice for reef keepers.
Peaceful and reef-safe, these snails are suitable for most community aquariums and spend their time moving across hard surfaces in search of food. They thrive in established systems with plenty of natural algae growth and stable water conditions. Due to their shell shape, they can struggle to right themselves if overturned, so occasional monitoring is recommended.
Care Information:
Scientific Name: Lithopoma tectum / Astraea spp.
Origin: Caribbean and tropical reef regions
Max Size: Approx. 2.5–4 cm
Diet: Herbivore (film algae, diatoms, microalgae)
Water Parameters: SG 1.023–1.025, 22–26°C, pH 8.1–8.4
Temperament: Peaceful
Reef Compatibility: Yes
A practical and eye-catching addition, the Spiny Astrea Snail offers both functional algae control and a unique look, making it a great choice for maintaining a clean and balanced marine aquarium.
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