Body elongate, with the foot extending far beyond the posterior end of the notum. A prominent oral veil edged with about 15-20 branched appendages. Rest of the mantle edge with small and ramified papillae along each side of the body. There are three pairs of large knob-like protuberances at the level of the gill. Gill composed of five tripinnate branchial leaves in the middle of the dorsum. Rhinophores lamellated.
black body with several large reddish ocellatus-like markings.
common size :
up to 30 mm.
No other species of this genus is present in the Mediterranean. A species quite similar in general aspect is Kaloplocamus ramosus (Cantraine, 1835), which however lacks the large protuberances with terminal knob. The general background body color of this Mediterranean species is yellow to orange with white spots. The pattern of black background color with large reddish spots of Plocamopherus ocellatus is present in no other Mediterranean nudibranch.
BIOLOGY / ECOLOGY
Unknown; as others species of the genus, it probably feeds on branching bryozoans and can swim by lateral flexion of the body. These species are known to give luminescent flashes when disturbed.
in the Mediterranean one specimen was dredged 50 m deep; the others were found in rocky bottoms down to 20 m in depth.