Mating behavior of neritopsines is poorly known. Because of the presence of separate sexes and copulatory structures, some mating behavior is likely present in this group. Clustering is one of the most common behaviors seen in intertidal neritopsines and the clusters are thought to reduce risks of both predation and desiccation. In these multilayered clusters, water loss is reduced and evaporative cooling helps regulate body temperature. Nerites are also known to have trail-following behavior; they can follow both their own and conspecifics' mucus trails on the substrate. These trails may be important in relocating microhabitats for both feeding and resting, and may play a role in building aggregations.
Display behaviors are unknown in the neritopsines, but the anti-predator responses to other predatory gastropods include shell elevation, rotations, flailing of tentacles, and rapid movement. Territorial behavior, or defense of a home range, is also unknown. Most activity patterns in intertidal species are mediated by light and tidal patterns. Up-shore migration is common in intertidal species, with the largest individuals often found at the highest intertidal levels. Freshwater taxa with an estuarine or marine larval phase have behaviors that cue the larvae to settle at the mouths of rivers and streams, followed by movement against the flow, literally crawling upstream into the freshwater habitat.
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