A comprehensive survey documents fish diversity in the Red Sea across 56 sites
Introduction to the field survey and its environmental objectives
In a strategic move reflecting a deep commitment to protecting natural resources, the General Authority for the Conservation of Coral Reefs and Turtles in the Red Sea (Shams) revealed the results of a comprehensive field survey aimed at monitoring fish diversity in the Red Sea. Research teams successfully documented the presence of 3,374 fish species distributed across 56 different marine sites. This intensive effort is part of the Authority's endeavors to build a scientific reference database that supports plans to conserve the unique ecosystems in the Kingdom of Saudi Arabia, in close alignment with the Sustainable Development Goals and the Saudi Vision 2030 environmental goals.
General context and historical importance of the Red Sea environment
Historically, the Red Sea is one of the world's most important and biodiverse water bodies, characterized by a semi-enclosed marine environment with high salinity and temperatures. This has enabled its organisms, particularly coral reefs and associated fish, to develop exceptional adaptability. Throughout history, the Red Sea has been a vital lifeline for coastal communities. However, modern environmental challenges such as climate change and overfishing have necessitated strong institutional intervention. This is where the role of the Shams Authority emerges as a modern national umbrella organization, aiming to transform individual efforts into sustainable institutional action that protects this natural and historical heritage.
The most prominent fish species observed in the survey
The survey data, covering the period from July 22 to August 1, 2024, showed a clear dominance of the striped surgeonfish (Ctenochaetus striatus), known locally as "al-Jouniya," which topped the list with a count of 1,014 fish. This species is crucial to the ecological balance, as it feeds on algae that can smother coral reefs. The dark parrotfish (Scarus niger) came in second with 383 fish, followed by the elegant unicornfish (Naso elegans) with 381 fish. The teams also recorded remarkable biodiversity, including 15 fish species, among them the parrotfish (Chlorurus sordidus) with 355 sightings and the brown surgeonfish (Acanthurus nigrofuscus) with 258 sightings, reflecting the richness and diversity of the marine environment.
Environmental indicators and adaptation to temperature changes
The survey covered a wide range of depths, from 2 to 31 meters, providing a comprehensive picture of the distribution of marine organisms across different water layers. One of the most significant findings of the accompanying environmental readings was the remarkable resilience of marine life in the region; the average water temperature during the monitoring period reached 32.1°C. This high temperature necessitates specific physiological adaptations from marine organisms, making the Red Sea a global natural laboratory for studying the ability of coral reefs to withstand global warming. Furthermore, most fish sightings were concentrated in the medium-sized category (between 10 and 20 cm), indicating a young and active generation that supports the continuity of the food chain.
Expected impact of the survey locally, regionally and internationally
This research movement is a cornerstone in shaping future conservation strategies. Locally, this data provides decision-makers with a clear roadmap for identifying priority protection areas, supporting major ecotourism projects and ensuring the sustainability of resources for future generations. Regionally, this data contributes to understanding the movement of shared fish stocks in the Red Sea basin. Internationally, documenting the ability of these fish and coral reefs to thrive in temperatures exceeding 32°C offers the global scientific community hope and crucial data in the fight against global coral bleaching, reinforcing the Kingdom's position as a leader in marine conservation.
