Marine organisms are a wonderful source of biologically active natural products. Sea cucumbers are among the marine organisms which use as traditional food, especially in Asia. They are cylinder-shaped invertebrates that live in a variety of sea floor habitats from warm tropical waters to cold deep-sea trenches. Holothuria atra is the most important and abundant sea cucumber species in the Red Sea on the Saudi Arabia coast. Sea cucumber contains physiologically active phenolic compounds with antioxidant activity, which afforded a potential therapeutic activity against hepatorenal diseases.