Common name : horn snail or mudwhelk

Aspect : elongate-conical to turreted, moderately thick, and range from small (10–40 mm) to large (up to 190 mm); spiral cords, axial ribs (often beaded where intersecting), varices (thickened growth lines); colors are dark brown, black, reddish-brown, sometimes banded; some species have columellar folds or flaring lips

Feeding : detritivores and microalgal grazers

Environment : Eastern Africa to northern Australia, Pacific islands; intertidal mangrove forests and mudflats in brackish zones