Coral Reef Diagnostics

Maldives - Ghuli Faru

Reef Check Foundation
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05
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2017-05-17
Coordinates
3.9866, 73.5139
Coral cover
5.4%*
Claude computer vision (17 edited photos) · other methods below · median 0.0%
*Based on only 17 reef-habitat photos; this estimate is less certain.
Observations
None tagged; see Stressors below
Heat stress
Most recent heat load record
26 Oct 2026 · Bleaching Watch
5-year thermal stress load
5-year mean max. degree heating weeks (DHW)
2021–2025
NOAA Coral Reef Watch — Maldives virtual station
i 5-year mean max. DHW is the mean of the annual maximum DHWs over the five complete years named above, not conditions today.
More infoMaldives (NOAA CRW virtual station)
Photographs
25
22 shown on this page
Site summary
Read this summary in:

A fast, plankton-thick drift dive better known for its wildlife than its coral — a coffee-table-sized bumphead parrotfish, a Napoleon wrasse, spotted eagle rays, and a river of snappers, all in poor visibility.

Max. depth dived
29.6 m
sample-sheet maximum
Sea surface temp. (satellite)
29.8°C
satellite sea surface temperature (SST) on the survey date (NOAA Coral Reef Watch, Maldives), not an in-water reading; it is the warmest-pixel (90th percentile) reading in the station area and can run 1–1.5°C above the reef
Bottom time
60 min

Four independent survey stations shown with the program’s logo — click one to see how far it is from this site.

Eight other CRD dive sites with their own pages within 5 km shown in orange — click a marker to open its page.

9 of the 22 photographs on this page are shown beside the text that discusses them under "Site description" below.

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Photo credit & attribution

Site description

Setting

The water at Ghuli Faru was thick with plankton and moving like a freight train — one photo shows a diver pinned flat, bubbles streaming sideways — and that soup is exactly why the big animals came (e.g., Image 21).

General benthic features

Whip corals leaned hard into the current beside an unfurled black crinoid, and a blotchy map-type puffer sat out the chaos wedged among the corals (e.g., Image 24).

Coral cover

Stressors

In May 2017 divers from Coral Reef CPR and Carpe Diem Maldives found no crown-of-thorns starfish on this reef. The only corallivore photographed is a cushion star, Culcita by Anderson's own identification (e.g., Image 1).

Fish and other fauna

Out of the violet haze loomed the dive's monster: a bumphead parrotfish the size of a coffee table, photographed bulldozing the rubble and then point-blank, flank filling the frame (e.g., Image 6, Image 15).

A Napoleon wrasse ghosted past twice, once trailing an entourage of jacks; spotted eagle rays sailed by on the edge of visibility; and a golden river of bluestripe-type snappers ran along the reef (e.g., Image 2, Image 9, Image 12, Image 17).

Comparisons with other data

Coral Reef CPR and Carpe Diem Maldives surveyed this site for crown-of-thorns sea stars in May 2017. Within 5 km, four independent stations recorded station-year means of 5.5–76% hard coral cover between 2015 and 2025; the nearest, Montefalcone et al. (2020) at Cocoa Corner, 0.85 km away, read 76% in 2015.

Dive record

An hour in the current, barely any visibility — and, in Anderson's field notes, a very large bumphead parrotfish.

CV model comparison

Mean 5.4%, median 0.0% across 17 photos.
More infoA few colony-focused photos raise the mean; the median is the typical photo. No computer-vision method yet estimates coral cover accurately on new images, so treat this as indicative rather than a measurement; it is revised as the methods improve.
Headline: Claude computer vision, a blind point count of this site's own photographs.
More infoOther rows are for comparison only and are never averaged. No diver transect exists for these photos, so agreement between rows is not accuracy.
MethodHard coral cover (%)Photos (n) ± SE
In-house DINOv310.3
CoralSCOP edited12.7
Claude (edited photos)5.4*n = 17 · SE 2.3

The two computer-vision methods agree within 2.4 pp (10.3–12.7%) and read 4.9–7.3 pp above Claude's blind point count (5.4%); the headline is Claude's blind point count because no transect or manual count exists here.

*Based on only 17 reef-habitat photos; this estimate is less certain.

Independent surveys nearby

Data availability near this site
Agency / programYear(s)Stations / distanceLink
Montefalcone et al. (2020)20151 station, 0.85 kmRecords ↓
Montefalcone et al. 20262024–20251 station, 2.87 kmRecords ↓
Reef Check20221 station, 1.62 kmRecords ↓
XL Catlin Seaview Survey2015–20171 station, 4.71 kmRecords ↓
Hard coral cover over time — this site and every independent station within 5 km. Programs are shown separately because they use different methods at different stations; the lines are not one comparable series.
0%20%40%60%80%201520202025Montefalcone et al. (2020) 2015: 76%XL Catlin Seaview Survey 2015: 7.1%XL Catlin Seaview Survey 2017: 5.5%Reef Check 2022: 19%Montefalcone et al. 2026 2024: 43%Montefalcone et al. 2026 2025: 39%Coral Reef Diagnostics 2017: 5.4%Year-averaged across all programs: illustrative only; the programs differ in stations and method, so no trend is claimed (5 years)
Montefalcone et al. (2020) XL Catlin Seaview Survey Reef Check Montefalcone et al. 2026 Coral Reef DiagnosticsYear-average (illustrative only, programs differ)

Within 5 km, 4 independent survey stations recorded hard coral cover in 6 records between 2015 and 2025. Of the 2 stations surveyed in more than one year, 1 was scored by divers or by people annotating photographs: declined by 4.0 points between its first and latest surveys. The other 1 was scored by automated image analysis: changed by 7 points or less, inside the 7-point method-noise floor (inconclusive). The longest record, transect 37035 (XL Catlin Seaview Survey, 4.71 km away), went from 7.1% in 2015 to 5.5% in 2017. Since 2021, station-year means average 34% (range 19–43%; n = 3 station-years from 3 records). This site's own estimate (5.4%) sits 13.6 points below the recent value up to 2 km away (19%); 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; the XL Catlin Seaview Survey uses photo-transects with automated image annotation), so these are context for the figures above, not a like-for-like comparison. Where a station was surveyed more than once, the cell shows either the range of its values or, as a single value, the mean of surveys made in one year. Station names are not dive-site names. Values above 70% are marked “best patch”: surveys often target the densest coral on a reef, so these may overstate the site as a whole.

Independent survey data near this site
AgencySite / locationDateHard coral cover (%)DistanceLink
Montefalcone et al. (2020)Cocoa Corner201576% best patch0.85 kmdoi:10.3389/fmars.2020.00587
XL Catlin Seaview Surveytransect 370352015–20175.5–7.1% (2 surveys)4.71 kmdoi:10.14264/uql.2019.930
Reef CheckGulhi Island Backreef202219%1.62 km—
Montefalcone et al. 2026Kuda Giri Wreck2024–202539–43% (2 surveys)2.87 kmdoi:10.1007/s00338-026-02850-x

Data & links

All images from Coral Reef Diagnostics. Data are from Coral Reef Diagnostics and the organizations named in the data sources above.

© Coral Reef Diagnostics.

References

  1. Montefalcone M, Morri C, Bianchi CN (2020). Influence of Local Pressures on Maldivian Coral Reef Resilience Following Repeated Bleaching Events, and Recovery Perspectives. Frontiers in Marine Science 7:587. PDF
  2. Montefalcone M, Bianchi CN, Morri C, Ahmed H, Pancrazi I (2026). Outcomes of the fourth global coral bleaching (2023–2024) in the Maldives. Coral Reefs. DOI
  3. Gonzalez-Rivero M, et al. (2019). Seaview Survey photo-quadrat and image classification dataset. The University of Queensland (UQ eSpace) data collection. DOI