What does coral have on their tentacles to catch prey?

Coral has specialized structures called nematocysts on their tentacles, which are tiny, stinging cells. When triggered, nematocysts can release a barbed thread that injects toxins into prey, such as small fish and plankton, helping corals capture and immobilize them for feeding. These stinging cells are essential for the coral's survival, as they provide a means to obtain nutrients in their often nutrient-poor environments.