Luidia savignyi is a large starfish, with the distance between the tips of extended arms sometimes reaching about 30 cm (12 in).

The colour of the aboral surface is very variable between individuals, being greyish with beige, burgundy, greenish or brownish spots and patches.

[2] Luidia savignyi is native to the tropical and subtropical Indo-Pacific region, its range extending from the Red Sea and East African coast to the Philippines and New Caledonia.

Its typical habitat is uncompacted sandy-mud, but it also frequents rock slabs covered with coral rubble and algae.

It does not invaginate its stomach as many starfish do, but stretches its mouth wide and swallows its prey whole; the small disc becomes swollen and distorted after a large meal.