Part of the regional summaries: Egypt and Red Sea

Gazella Reef is a well-built ridge-and-slope system - corymbose and staghorn Acropora, cauliflower pocilloporids in pink and lavender, with a lionfish sheltering in the shadows - and carries the clearest side-by-side bleaching evidence in the Wadi Lahami set: two touching Pocillopora colonies of identical growth form, one bleached uniform cream-white and one holding full pink-lavender pigment. Published cover was 17% with 53.8% of coral tissue bleached, the lowest bleaching figure of the four Wadi Lahami sites here but still more than half the reef.
شعبة غزالة منظومة حيد ومنحدر جيدة البناء — Acropora عنقودي مسطح وقرني، ومرجانيات شوكية تشبه القرنبيط بلونين وردي وبنفسجي، مع سمكة أسد تحتمي في الظلال — وتحمل أوضح دليل مقارن على الابيضاض في مجموعة وادي لحمي: مستعمرتان متلامستان من Pocillopora بالشكل النمائي نفسه، إحداهما مُبيَّضة بلون كريمي موحد والأخرى محتفظة بكامل صبغتها الوردية البنفسجية.
ترجمة هذا الملخص بالذكاء الاصطناعي؛ النص الإنجليزي هو المعتمد. Translated from the site’s shorter map summary.
Two independent survey stations shown with the program’s logo — click one to see how far it is from this site.
Four other CRD dive sites within 5 km shown in orange — click a marker to open its page.
The reef is a ridge-and-slope system: a coral-covered ridge running along the drop, canyon-like gaps between coral massifs, and a face descending into deep blue with sand at its foot (e.g., Image 3, Image 4).
It is more built than Shabrour-north — corymbose and staghorn Acropora, cauliflower pocilloporids in pink, rose, and lavender, encrusting, and foliose plates, faviids, and small massives packed along the ridge, with anthias and chromis pouring over it and a lionfish in the shadows (e.g., Image 1, Image 2).
Coral cover is 16.5% ± 12.2 across 214 photographs, quoted verbatim from Mayfield, A.B. (2025) Environments 12:248 — Red Sea 2023-24 bleaching; CoralNet point annotation, Appendix A — a manual, diver-annotated CoralNet point count from Anderson's own published work, not a computer vision output and not recomputed here.
The site record reports 53.8% of coral tissue bleached at about 21.9°C-weeks DHW, the lowest bleaching figure of the four Wadi Lahami sites here but still more than half the tissue on the reef. The frame Anderson captioned "dead vs. alive" is a deliberate side-by-side: his own finger points at a bleached cream-white Pocillopora sitting directly beside a fully pigmented pink-lavender Pocillopora of the same growth form, on the same patch of rock. Two colonies, one frame, one comparison.
No independent survey was made at this exact site; the nearest ones are listed in the table below.
The second dive of 22 September 2024 with Red Sea Diving Safari, on the reef complex south of Shabrour.
See flags.
| Method | Hard-coral cover (%) |
|---|---|
| Manual (published) | 16.5 |
| In-house DINOv3 | 40.6 |
| Claude | 28.0 |
Within 5 km, 2 independent survey stations recorded hard coral cover in 16 surveys between 2009 and 2023. Of the 2 stations surveyed in more than one year, 1 declined and 1 increased between their first and latest surveys. The longest record, Wadi Lahami House Reef 1 (Reef Check, 3.20 km away), went from 30% in 2009 to 41% in 2023. Surveys since 2021 average 43% (range 41–44%, n=2). This site's own estimate (17%) sits 24.7 points below the recent range (41–44%); the methods differ, so the comparison is context, not a like-for-like test.
Collected by other programs using different methods (Reef Check uses point-intercept transects), so these are context for the figures above, not a like-for-like comparison. Where a station was surveyed more than once the range is shown. Station names are not dive-site names.
| Agency | Site / location | Date | Hard coral cover (%) | Distance | Link |
|---|---|---|---|---|---|
| Reef Check | Wadi Lahami House Reef 1 | 2009–2023 | 30–46% (8 surveys) | 3.20 km | — |
| Reef Check | Wadi Lahami House Reef 2 | 2009–2023 | 44–56% (8 surveys) | 3.23 km | — |
All images from Coral Reef Diagnostics. Data are from Coral Reef Diagnostics and the organizations named in the data-sources table above.
© Coral Reef Diagnostics.