Luidia foliolata, the sand star, is a species of starfish in the family Luidiidae found in the northeastern Pacific Ocean on sandy and muddy seabeds at depths to about 600 m (2,000 ft).

The sand star could be confused with Astropecten verrilli, but in that species, the large marginal plates are visible from above.

[4] The sand star is found at depths to 600 m (2,000 ft) on soft substrates in the northeastern Pacific Ocean, with a range extending from Alaska to the Galapagos Islands and Nicaragua.

It can create a shallow depression and work its way under the bivalve molluscs, polychaete worms, brittle stars, and sea cucumbers on which it feeds.

[4] The long, pointed tube feet are specially adapted for movement over soft sediments, but lose traction if the sand star tries to scale steeply sloping rocks.