Passionibus

Passionibus is a genus of marine gastropod molluscs in the family Muricidae, commonly known as murex snails or rock snails. These predatory snails are found in various marine environments, primarily in tropical and subtropical waters worldwide. Their shells are often characterized by elaborate spines, knobs, or ridges, which serve as a form of defense and may aid in camouflage. The specific morphology of the shell can vary significantly between species within the genus.

Passionibus snails are carnivorous, feeding on other invertebrates such as bivalves, other gastropods, and barnacles. They possess a radula, a ribbon-like structure with teeth, which they use to bore through the shells of their prey or to scrape off soft tissues. Some species have also been observed to be scavengers. Reproduction in Passionibus typically involves the laying of egg capsules, which are often attached to hard substrates. The larval development can be direct or indirect, depending on the species. Historically, certain species of murex snails, including those within the broader family, were a source of valuable purple dyes, such as Tyrian purple, derived from their hypobranchial gland. However, the genus Passionibus itself is not as prominently linked to dye production as some other murex genera. Conservation concerns exist for some populations due to habitat degradation, overfishing, and the pet trade.