Hooked Slippersnail

Crepidula adunca

Crepidula adunca, commonly known as the Hooked Slippersnail, is a small marine gastropod that typically reaches a shell length of about 2.5 cm. Its shell is characterized by a dark brown color and a distinctive hooked peak that faces backward. This species is often found in semi-permanent stacks, usually comprising more females than males, which can help distinguish it from other similar species. The Hooked Slippersnail is primarily located in the Eastern Pacific Ocean, ranging from British Columbia, Canada, to Baja California, Mexico, and inhabits middle to low intertidal zones, usually at depths shallower than 40 meters, with many records from depths less than 20 meters. They prefer warm weather and have seen population increases due to climate change. As a filter feeder, the Hooked Slippersnail captures small organisms such as diatoms and phytoplankton using cilia to create a mucous net. This species is hermaphroditic, meaning individuals have both male and female reproductive organs. They brood their young in capsules within their mantle cavity, with embryos developing into crawling juveniles before they hatch. Reproduction occurs throughout the year, and juveniles can begin filter feeding immediately after hatching. Diving encounters with the Hooked Slippersnail may reveal them attached to the shells of other snails, particularly Turban Snails, where they often reside. Observers may notice their unique shell shape and coloration, which can help in identifying them among other gastropods. The conservation status of Crepidula adunca is currently listed as Not Evaluated, indicating that more research is needed to assess its population dynamics and potential threats.