### Identification The Foliate Hoof Snail is a master of architectural texture. Its shell is a small, cap-shaped marvel—usually under 20mm—defined by dramatic, concentric ridges that overlap like the petals of a desert rose or weathered shingles on an old roof. These "foliaceous" lamellae give it a rugged, leafy profile that distinguishes it from the smoother true limpets. Look closely at the apex (the peak); unlike the centered point of a limpet, the *Antisabia* apex is tilted distinctly toward the posterior. Its coloration is typically a muted creamy-white to pale yellow, though it is often camouflaged by a thin layer of silt or algae.
### Habitat & Range This species is a staple of the Indo-Pacific rocky intertidal zone. You will find them clinging to the undersides of boulders or wedged into limestone crevices from the low-tide mark down to shallow sub-tidal reefs. They thrive in high-energy environments where oxygen-rich water washes over them. Interestingly, they are frequent "hitchhikers," often found cemented to the shells of larger gastropods, such as Turban snails or even other Hoof snails.
### Behaviour *A. foliacea* is remarkably sedentary. Once a larva settles and matures, it rarely moves again. To ensure a perfect seal against the rugged reef, the snail secretes a thick, calcareous base plate—essentially a custom-built stone floor—between its soft body and the rock. In the field, you might find empty "hoof-prints" on rocks; these are the abandoned base plates of snails that have perished or been dislodged.
### Diet Unlike their grazing cousins who roam the rocks to scrape up algae, these snails are suspension feeders. They remain stationary and use their specialized, oversized gills to filter organic particles and plankton directly from the passing current. It is a highly efficient, "sit-and-wait" strategy that saves precious energy in the turbulent surf.
### Fascinating Fact The Foliate Hoof Snail is a protandric hermaphrodite. Every individual begins its life as a small, mobile male, searching for a place to settle. Once it finds a prime location (or a large female to settle upon), it grows significantly and undergoes a biological transformation, ending its life as a stationary, egg-producing female!