The white body has a very fine, opaque white stipple, most noticeable where translucency is strongest, such as the head, cephalic tentacles and puckered mantle.
The mantle varies from white (1) or cream to yellowish white (2).
The white or yellowish white penis (3) is behind the animal’s right tentacle. It greatly enlarges when in use (see 18 Velutina velutina. Sublittoral. Water temperature 3ºC. Norway. January 2013. © E. Svensen. ).

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