The Spiny Astrea snail eats many types of algae including hair algae. Its shell has small spikes all over. It stays small at 1.5 inches which allows it to reach small crevices in the live rock. It should be placed right side up on the sand after acclimation. It is adapted to rocky habitats; if it falls onto its back on the aquarium's sand it is not physically able to flip over and must be assisted. Snails are extremely sensitive to changes in water quality.
