Tylodina corticalis, Port Stephens, NSW, Photo: Tom Davis
Only species in the family recorded from Australia. The animal is bright chrome yellow with a wide foot, and the shell is oval-shaped and covered by a thick brown protective layer (the periostracum) with strong radial ridges. The species is very rarely seen outside the autumn months. It feeds on a yellow sponge (Pseudoceratina sp).
Max Size: 10 cm
Sea Temperature Range: 12.7-21.9°C
Depth: 0â€“60 m
Habitat: Rocky Reef
IUCN Threat Status: Not Evaluated
Occurrence: Infrequent (2% 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: Solitary (1 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: Nicola Davis, GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney