Scaphander punctostriatus, common name the giant canoe bubble, is a species of sea snail, a marine opisthobranch gastropod mollusk in the family Scaphandridae, the canoe bubbles.

The surface appears smooth but, under a microscope, reveals fine spiral lines of tiny, elongated pits (punctations).

[2] The shell is whitish, covered by a thin yellowish periostracum, and occasionally displays faint, darker spiral bands.

[2] This marine species occurs widely in the North Atlantic, Gulf of Mexico, and Mediterranean.

Off South Africa is it is found on the outer continental shelf and upper slope along the West Coast and Agulhas Bank, at depths of 170–2700 meters.