17 Aeolidiella alderi

17 Aeolidiella alderi

The reddish digestive gland in the cerata and the translucent red rhinophores might lead this A. alderi to be confused with A. sanguinea, but the translucent white body is too broad and lacks the red tint of the slender, sinuous A. sanguinea .
Length 6.6 mm. Menai Strait, Wales, March 2012.