ProsobranchiaProsobranchia

Prosobranchia, a group of marine gastropod molluscs, are named for their characteristic gills positioned in front of the heart. Members typically possess a spirally coiled shell, though some forms are cap-like or dish-shaped. A well-developed operculum generally seals the shell opening. Adults range from a few millimetres to over 30 cm (12 in) and exhibit diverse colours and patterns.

They inhabit all 🌊 Red Sea benthic environments, from intertidal zones to deep reef slopes and sand flats, with most species found within recreational diving depths. Many prosobranchs crawl on a muscular foot, extending a pair of cephalic tentacles. Their diet is highly varied, including herbivores grazing on algae, detritivores, filter feeders, and predators that consume bivalves, echinoderms, sponges, or coelenterates. Some parasitic species have lost their shell and internal organs.