12 Polycera quadrilineata

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12 Polycera quadrilineata

On specimens with little or no dark pigment on the body, the gills are usually translucent white with yellow or orange tips. The gills do not retract into a pit, but they can contract into a small tight clump around the anal papilla (1).
Menai Strait, Wales. February 2011.

Imprint

Photographic guide to the identification and biology of European marine invertebrates

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