Astrea Snail

Astrea snails are relentless algae grazers, but they share a well-known blind spot with a lot of top-heavy reef snails — flip one onto its back and it often can't right itself again, stranded until a keeper or a curious hermit crab intervenes. Worth knowing before you stock a bunch of them, but not enough of a downside to keep this species from being one of the most reliable algae eaters in the hobby.

Care level: Easy · Temperament: Peaceful · Max size: ~1" · Min tank: 10 gal · Reef safe: Yes · Diet: Herbivore, algae