Janolus hyalinus. Length 15mm. Brown dorsum marked with opaque white flecks which concentrate in places into patches of white; two in front of rhinophores resemble false eyes. Floating in water’s edge, LWS, Menai Strait. April 2011. Species Janolus hyalinus Photographer / copyright holder I.F. Smith
Aeolidiella glauca. Length 20mm. Opaque white stipple on white translucent propodial tentacles, oral tentacles and posterior tip of foot. Anterior cerata form white ruff. Internal eyes and dark viscera visible through translucent body. LWS, Menai Strait. Species Aeolidiella glauca Photographer / copyright holder I.F. Smith
Aeolidiella glauca. Length 20mm. Translucent white foot reveals white blobs of ovotestis, white body much narrower than foot, and overhanging cerata. Anterior of foot convex with well developed propodial tentacles. LWS, Menai Strait. Feb. 2011. Species Aeolidiella glauca Photographer / copyright holder I.F. Smith
Aeolidiella glauca. Length 20mm. Translucent orange rhinophores with distal white stipple. Anterior cerata form white ruff similar to that of A. alderi, but dorsum has stipple of A. glauca and animal stouter than A. alderi. Low water spring tide, Menai St Species Aeolidiella glauca Photographer / copyright holder I.F. Smith
Aeolidiella glauca. Length 20mm. Extended translucent head reveals internal eyes, buccal mass and mouthparts. Oral tentacles transparent white with distal opaque white stipple. Slender point on tail of foot. LWS, Menai Strait. April 2011. Species Aeolidiella glauca Photographer / copyright holder I.F. Smith
Doto koenneckeri. L. 9mm. Unpigmented pale subdorsal lines. Single row of five cerata each side of body leaving dorsum fully exposed. No cnidosacs. LWS, Menai Strait, Wales. August 2010. Species Doto koenneckeri Photographer / copyright holder I.F. Smith
Aeolidiella sanguinea. Orange specimen with orange-brown internal digestive gland, and distinct white tips on cerata. No surface pigment. Blood-red specimens also occur. LWS, Menai Strait, Wales. Sept. 2009. Species Aeolidiella sanguinea Photographer / copyright holder I.F. Smith
Eubranchus exiguus. 2.5mm long specimen with only a few cerata. Purple-red internal digestive band. LWS, Mersey Estuary. September 2010. Species Eubranchus exiguus Photographer / copyright holder I.F. Smith
Eubranchus exiguus. Bottom left; 2.5mm long specimen with only a few cerata. Top right; three masses of probable spawn, but T. tergipes also present, so may belong to it. LWS, Mersey Estuary. September 2010. Species Eubranchus exiguus Photographer / copyright holder I.F. Smith
Eubranchus exiguus. Cerata: transparent cerata fully inflated and balloon-like, apical band of brown and white, with white band below. Peach-colour internal digestive gland. LWS, Menai Strait, Wales. March 2011. Species Eubranchus exiguus Photographer / copyright holder I.F. Smith
