Gyrineum perca is a species of predatory sea snail, a marine gastropod mollusk in the family Cymatiidae. It is more commonly known as the winged triton or the maple leaf triton.
Shells of Gyrineum perca can reach a length of 31–100 millimetres (1.2–3.9 in). These unusual shells are quite flattened, well adapted to laying on a soft substrate, with large flanges close to the outer lips and a blade-like outpouching of the outer shell layer, forming two longitudinal folds (hence the genus name). Shell surface may be whitish, yellowish or pale brown.
This species is widespread from the Eastern Africa to Japan.
