Left: 8 mm long with nine groups of cerata on each side. Drawing by Alder & Hancock, 1845-55, "British nudibranchiate mollusca", as Hermaea dendritica.
Right: 4.6 mm long with five groups of cerata each side. August 2013. Menai Strait, Wales.
The body, rhinophores (1), head (2) and metapodium (3) are translucent white or greenish white with an internal, green to olive-brown, dendritic, digestive gland with diverticula into and filling the cerata (4). Scattered opaque white spots are most concentrated near the ends of the rhinophores and cerata.
01 Placida dendritica.
