Sea Cucumber Farming in Yemeni Coasts: Environmental Potential and Economic Feasibility The Yemeni coasts represent a marine environment rich in biodiversity and offer promising opportunities for developing aquaculture activities, most notably sea cucumber farming (Holothuria spp.), due to its nutritional, medicinal, and economic importance. This study examines the available potential for sea cucumber farming along the Yemeni coasts, with a focus on areas characterized by the presence of marine “khors” such as Khor Omaira, Ras Al-Arah, Al-Mokha, Ash Shihr, and Ghayl Ba Wazir. It also reviews the environmental requirements necessary for successful sea cucumber aquaculture, its positive impact on the ecosystem, and its economic feasibility through its role in enhancing Yemeni exports. Introduction Sea cucumbers are marine organisms belonging to the phylum Echinodermata, characterized by environmental and economic traits that have made their aquaculture a growing global activity. Their importance in Yemen is highlighted by the high global demand, as the country exports more than 500 tons annually to international markets, particularly in Asia. Sea cucumbers hold dual importance: on one hand, they contribute to maintaining marine ecological balance, and on the other, they represent an important economic resource supporting coastal communities. Environmental Characteristics of the Yemeni Coasts The Yemeni coastline extends over more than 2,500 km, spanning the Red Sea, the Gulf of Aden, and the Arabian Sea. Within these coasts, several locations are characterized by the presence of “khors,” which are semi-enclosed coastal areas connected to the sea and characterized by relatively calm waters, making them suitable for sea cucumber farming. The most notable of these areas include: • Khor Omaira and Ras Al-Arah (western coast) • Al-Mokha (entrance to the Red Sea) • Ash Shihr and Ghayl Ba Wazir (Hadramout coasts). These areas possess ideal environmental conditions for sea cucumber aquaculture, such as good water quality, appropriate salinity, and moderate temperatures. Environmental Requirements for Sea Cucumber Farming Successful sea cucumber aquaculture requires the availability of specific conditions, most importantly: Water quality: It must be clean and free from industrial and agricultural pollutants. Temperature: Ranges between 24–30°C, which aligns with the environments of the Red Sea and the Gulf of Aden. Salinity: Around 30–35‰, which is available in most Yemeni coastal waters. pH level: Between 7.5–9 to ensure a suitable environment for growth. Environmental Impact of Sea Cucumber Aquaculture Sea cucumbers play an important role in the sustainability of marine ecosystems, as they: • Contribute to sediment purification by feeding on organic matter. • Help enhance fisheries productivity through their role in the food chain. • Contribute to maintaining biodiversity by reducing organic pollution and improving seabed quality. Economic Importance • Sea cucumbers hold a prestigious position in global markets, especially in China and Southeast Asian countries, where they are used as a luxury food and in traditional medicine. • Data indicate that Yemen exports more than 500 tons annually of sea cucumbers. • Sea cucumber aquaculture can contribute to increasing this quantity, thereby generating greater economic returns. • It provides new job opportunities for local fishermen and enhances the income of coastal communities. Recommendations • Support research projects to develop sea cucumber aquaculture techniques in Yemen. • Encourage pilot farms in areas with natural khors such as Khor Omaira and Ras Al-Arah. • Establish a legal framework that ensures sustainable fishing and aquaculture while protecting endangered species. • Strengthen partnerships between the public and private sectors to invest in this promising field. Conclusion In conclusion, the Yemeni coasts, with their unique environmental characteristics—particularly in khor areas—represent an ideal environment for developing sea cucumber aquaculture projects. These projects constitute a strategic step toward achieving sustainable development by combining marine environmental conservation with enhanced economic returns.