Coryphella verrucosa rufibranchialis
Mature adult with white ovotestes (1). Cerata have coloured digestive gland (2) and a narrow, subterminal, opaque white ring (3) encircles the translucent white tip (4) containing cnidosacs.
Continuous white dorsal line on tail, sometimes a broken, white dorsal line on body.
Isle of Man, May 2016. © T. Nicholson.

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