Habitat: it lives in low sandy bottoms of the infralittoral zone. Distribution: common all over the Mediterranean.
Notes: it is much smaller than its similar one C neritea from which it is recognizable since it is flatter, it has a more convex basal callosity and it has a different colour pattern. Its base is either white or yellowish in colour, while its back (bright) has flammulae (much wider than neritea ones) either undulating or at zigzag, brown in colour, wholly smooth.
Even in this species juvenile specimens have an elevated spiral, so they are very different in outline compared with adults. Comparing the respective radula, Rolan (2006) assumes that Cyclope kamicsch (Chenu, 1859), collected in the Sea of Marmara (Turkey), can be a valid species, distinct from C. pellucida while CLEMAM consider it as a synonym of C neritea. Average measures are about 8-9 mm in width by 5 mm in height.