Calyptraeoidea

Range

Greener is more native, amber more introduced; paler is less certain. How this was decided

• Pacific Half-slipper Snail Crepipatella lingulata 1,080 observations
• Hooked Slippersnail Crepidula adunca 1,023 observations
• Onyx Slippersnail Crepidula onyx 1,020 observations
• Western White Slipper-shell Crepidula perforans 232 observations
• Crepidula norrisiarum 219 observations