Tylodina corticalis Tate 1889
small umbrella shell

The Small Umbrella Shell, Tylodina corticalis, is bright yellow with large head, a limpet-like shell, and and exposed gills on the right side of the body. For this reason, Tylodina corticalis is sometimes referred to as a side-gilled slug. It feeds on sponges and lays yellow egg coils.
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