SOLITARY ISLANDS
UNDERWATER
RESEARCH GROUP, INC.

Species Index

Tylodina corticalis
(Tate, 1889)

Common Name: Umbrella Shell

Distribution: Uncommon in the Solitary Islands Marine Park. Recorded from the southern mainland states of Australia and Lord Howe Island

Ecological Notes: Found on rocky reef where it feeds on sponges Pseudoceratina sp. Is diurnally active. Depth from intertidal to 100 m.

Additional Notes: One of the few side-gilled sea slugs to retain its external shell. Lays a bright yellow egg coil. Bottom photograph shows subject on possible food source sponge. Grows to 40 mm.

References: Gary Cobb, David Mullins, Nudibranchs Encyclopedia, 2nd Edition, 2015. Publishers Thomas Slone, Masalai Press and Tim Hochgrebe, Underwater Australasia. p.85.

Australian Museum, Sea Slug Forum. http://www.seaslugforum.net/factsheet/tylocort. Accessed 29/09/2018.