05 Margarites helicinus. Sublittoral, 9 m. Macduff, N.E. Scotland. May 2017. © C.Rickard.

05 Margarites helicinus. Sublittoral, 9 m. Macduff, N.E. Scotland. May 2017. © C.Rickard.

Some M. helicinus, especially juveniles, have one or two variably defined, brownish, spiral bands.These match the colour of the algae which they frequently occupy. See also photo by J. Batten flic.kr/p/67UC7w

marinvert.senckenberg.science/image-browse/