Description
Haliotis spp., commonly known as the Abalone Snail, is a powerful and highly efficient algae-grazing gastropod valued for both its utility and unique appearance. Recognized by its flattened, ear-shaped shell with a row of respiratory holes along one edge, the Abalone is a nocturnal grazer that spends much of its time clinging tightly to rockwork and hard surfaces. Though less visible than other cleanup crew members, Abalone Snails are among the most effective algae consumers available for reef aquariums.
Origin: Indo-Pacific
Depth: Intertidal to shallow reef zones (0–20 m / 0–65 ft)
Lighting: Not demanding; comfortable under all standard reef lighting conditions
Flow: Moderate; prefers stable water movement and oxygen-rich environments
Tank Placement: Rockwork and hard surfaces; rarely found on open sand
Temperature: 74–80°F (23–27°C)
Salinity: 1.023–1.026 SG
pH: 8.1–8.4
Diet: Herbivorous grazer – feeds on a wide range of nuisance and macroalgae including hair algae (Derbesia/Bryopsis), Ulva (sea lettuce), film algae, diatoms, and early-stage macroalgae growth; may also graze lightly on coralline algae; supplemental feeding with dried nori or macroalgae is recommended in very clean systems
Temperament: Peaceful
Size: Up to 10 cm (4 inches), depending on species
Care Level: Intermediate – hardy once established but requires stable parameters and sufficient algae availability
Compatibility: Reef-safe; safe with corals and fish; should not be housed with aggressive wrasses, triggerfish, or other shell-crushing predators
