17 Doto koenneckeri.

17 Doto koenneckeri.

D. koenneckeri preys on Aglaophenia pluma growing on rocks and especially on the alga Halidrys siliquosa, which often forms a belt below the Laminaria zone. It is easily identified by its lanceolate air-vesicles (1) which are subdivided internally (2).
Menai Strait, Wales.