Neritacea

Neritacea is a superfamily of aquatic snails, commonly known as nerites. These gastropod mollusks inhabit both marine and freshwater environments across the globe. They are characterized by their typically coiled shells, which can vary greatly in shape, color, and pattern. Many species of Neritacea exhibit intricate markings, making them popular among shell collectors. Their shells often have a single opening, an aperture, which is typically round or oval. The operculum, a hardened lid that seals the shell opening when the snail retracts, is usually a thick, calcareous plate.

The diet of nerites varies depending on the species and their habitat. Many are herbivorous or detritivorous, feeding on algae, diatoms, and decaying organic matter found on substrates like rocks, coral, and submerged vegetation. Some species may also consume small invertebrates. Nerites are found in a wide range of habitats, from tropical coral reefs and rocky intertidal zones to brackish mangrove swamps and even some freshwater rivers and streams. Their ability to adapt to different salinity levels contributes to their widespread distribution. Reproduction in Neritacea typically involves external fertilization, with females laying egg masses that often attach to hard surfaces. The larvae are planktonic before settling and developing into adult snails.