Goniobranchus geminus
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Goniobranchus geminus nudibranch

Goniobranchus geminus
Goniobranchus geminus

Goniobranchus geminus, also known as the gem sea slug, is a species of very colourful sea slug, a dorid nudibranch, a marine gastropod mollusc. It can reach a maximum size of 5cm.

G. geminus has large purple or purple-brown spots or marks, usually ringed with white, and often reticulate yellow background, and a purple border. Chromodoris geminus having four colour bands around the mantle edge, an outermost white, then translucent greyish purple, then white, then yellow.

Rudman, 1987


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