Western Mud Nassa

Phrontis tiarula

Phrontis tiarula is a small sea snail that typically has a shell length ranging from 9 mm to 20 mm. This species is characterized by its gills and operculum, which are common features among marine gastropods. Divers can identify it by its distinct shell shape and size, which sets it apart from other similar species in the family Nassariidae. The western mud nassa is found in the Pacific Ocean, specifically along the coast from California to Mexico, inhabiting sandy and muddy bottoms in shallow waters. Most recorded sightings occur at depths shallower than 40 meters, with the majority found at depths around 10 meters or less. This species is primarily a scavenger, feeding on organic matter and detritus found on the ocean floor. Its feeding habits contribute to the ecosystem by recycling nutrients. Breeding habits are not detailed in the available sources, but like many gastropods, they likely engage in some form of external fertilization. Encounters with this species during dives are typically unremarkable, as they tend to be solitary and may blend into their surroundings.