Also known as Button Shell, Commercial Top Shell, Commercial Trochus, Common Turban Shell, Giant Top Shell, Periwinkle Shell, Pyramid Shell, Pyramid Top, Smooth Top Shell, Tectus Snail, Top Shell Snail, Top Shell, Top Snail, Trocus Shell, Trocus Snail, Turban Snail.
Found sometimes, in large numbers in eel grass, and over shallow mud and sandy bottoms, of coastal reefs.
They feed on algae and detritus.
Length - 15cm
Depth - 0-20m
Used extensively in the shell craft industry and a source of mother-of-pearl. Ref: https://en.wikipedia.org/wiki/Tectus_niloticus