(Alder & Hancock, 1843)
Description:
The length of the body may reach 11 mm; it is coloured greenish white, with the digestive gland showing green or brownish through the translucent skin, especially within the cerata, which are arranged in a latero-dorsal pattern of up to eight transverse rows. Each ceras is smooth and rounded at the tip. The anal opening is antero-dorsal, just behind the head. The rhinophores are inrolled.
Habitat:
This species lives and feeds upon the algae Codium tomentosum and Bryopsis plumosa . All records of P. dendritica have come from shallow water, with rare captures on the lower shore.
Distribution:
Distributed in NW Europe from Norway to the Mediterranean Sea (Distr. P. dendritica), New England to the Caribbean Sea; Japan; Australia; California.