Coral Cover: Bahrain / Persian Gulf 2023-24

Shaded value = in the CV mean (shade deepens with cover) Gray italic = shown for comparison but left out of the CV mean: the gold standard (the reference value) and the manually annotated in CoralNet CoralNet benchmark annotations (reference values, not models), Coralscapes (not trusted), and any value that reuses the reference's own data n = frames behind the value — = not run or not applicable (see each region's notes) Site names and method names link out (new tab)

Coral Cover: Bahrain / Persian Gulf 2023-24

4 sites · 129 photos

No gold standard.

Site	Date	Headline (site page)	Claude	CoralSCOP unedited	CoralSCOP edited	Mean ± SD of CV	Range
Dilmunia Rock (Bahrain)	2023-09-23	0.5%*Claude	0.5^a,cn=10	—	5.0^a,bn=10	2.8 ± 3.2	0.5–5.0
Artificial Reef (Bahrain)	2023-09-23	0.9%*Claude	0.9^a,cn=16	—	40^a,bn=16	21 ± 27.8	0.9–40
Hayr Bul Thamah (Bahrain)	2024-08-23	9.9%Claude	9.9^a,cn=72	—	—	—	—
Al-Boom Wreck (Bahrain)	2024-08-23	0.0%Claude	0.0^a,cn=31	9.7^a,b,dn=31	—	4.9 ± 6.9	0.0–9.7
All sites (unweighted mean)		—	2.8	—	—	—	—

Notes for Bahrain / Persian Gulf 2023-24 (9)

[a] Value from the map's computer-vision method tables (denominator and photo set as on the site's page).
[b] CoralSCOP = per-frame sum of colony-mask area fractions (zero-filled; overlapping masks double-count), averaged over frames with an ok row. Area index, not a point count: denominator differs from any point-count reference. It is also unstable frame to frame (the same subject has scored 94.1% in one photo and 23.3% in another), and the mask sum overstates cover most on the healthiest reefs.
[c] Claude = blind 7-call point count on the EDITED (2023) AND UNEDITED (2024) photos, 20 points per photo, (HC+BL)/(20 − WATER − FISH − OBST), unknown points kept in the denominator; mean across photos.
[d] CoralSCOP here = the site page's frame-matched row: run on exactly the photos behind the Claude cell (per-frame values joined by file; capped at 100% per photo; zero-filled). Comparison only.
Mean/Range: Mean ± SD and Range are over the CV cells that enter the mean (CoralNet where independent, DINOv3, CoralSCOP unedited/edited, Claude). Gold standard, frames manually annotated in CoralNet, Coralscapes and same-measurement cells are shown in gray italic but never averaged.
* The site's headline coral cover rests on only 10–19 reef-habitat photos; this estimate is less certain.
Headline (site page): the coral-cover figure the site's page, report card and map pop-up print, with its method; it is never averaged into the CV mean.
Methods: Claude (Anthropic); DINOv3 (Meta; paper; used here as the frozen backbone of the in-house classifier); Coralscapes v1 and v2 (EPFL-ECEO; dataset paper, code); CoralSCOP (Zheng et al., CVPR 2024); CoralNet.
Sites: names drop the region prefix (hover for the full name) and link to the site's CRD page, or to the regional summary page where the site has none. Date = survey date from the map pins (first–last visit); sites are listed earliest first, undated sites last.

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