What are the ossicles on a star fish?

Starfish don't have ossicles.

Ossicles are small, bony plates found in the endoskeleton of echinoderms, which include sea urchins, sea cucumbers, and brittle stars. They provide support and structure.

Starfish, however, have a calcium carbonate skeleton that's more like a meshwork than a solid, bony structure. This meshwork is made of tiny, interlocking plates called spicules. These spicules are embedded in the skin and provide support and flexibility.

So, while starfish have a skeletal system, they don't have ossicles like other echinoderms.