梅花参（学名：Thelenota ananas）为刺参科梅花参属的动物。

身体长可达1米；背面肉刺很大，每3－11个肉刺基部相连呈花瓣状，所以得名“梅花参”；又因为体形像凤梨，所以又称“凤梨参”；腹面平坦，管足小而密布；口稍偏于腹面，周围有20个触手；背面为橙黄色或橙红色，散布黄色和褐色斑点，腹面带赤色，触手黄色。

Thelenota ananas, also known as pineapple sea cucumber, oloturia ananas, tripang, prickly skin cucumber, pointed teat sea cucumber, armoured sea cucumber, giant sea cucumber, sand fish or prickly redfish, is a species of sea cucumber found in tropical waters from the Red Sea to New Caledonia. Its reddish-brown body with large and mostly branched papillae can reach up to 70 centimetres (28 in) in length. This species can be found on clean sandy bottoms of the ocean near large coral heads. It has a distinctive appearance with large pointed teats in groups of two or three all over the surface of its body. It has numerous large tubed feet on its flat underside as well. This type of sea cucumber is edible and is considered a delicacy in the Far East countries. Due to intense commercial exploitation, the population of T. ananas has declined by 80-90% in at least 50% of its range; it is listed as endangered by IUCN.