Ocosia spinosa, commonly known as the spine, stone dog, or stone fish, is a species of marine ray-finned fish, a waspfish belonging to the subfamily Tetraroginae, which is classified as part of the family Scorpaenidae, the scorpionfishes and their relatives.

It is found in the western Pacific Ocean of Taiwan, with a depth of 288 meters.

Ocosia spinosa perches on the soft bottom of the edge of the continental shed and catches small fish and crustaceans with its use of camouflage and poisonous glands under its spines.

The body of Ocosia spinosa is long and laterally flat, and the front of the back is raised.

The starting point of the dorsal fin extends to the top of the eye and the second spine is the longest and gradually becomes shorter.