Crepidula adunca

Hooked slipper snail
Crepidula adunca
Crepidula adunca, British Columbia, Canada, Photo: Em Lim

Distribution


Description

Cap-shaped shell around 2.5cm in length, with the beaklike recurved apex of the shell nearly as tall as the shell is wide. Females most often found upon the shell of turban snails (Tegula spp.), while males move from snail to snail. Periostracum is dark brown. 


Information

Max Size: N/A cm

Sea Temperature Range: N/A

Depth: N/A

Habitat Generalization Index: N/A

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.


Conservation and Rarity

IUCN Status: Critically Endangered

Occurrence: Widespread (100% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Many (23 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.