Coral Reef Diagnostics

Maldives - Kuda Giri Wreck

Reef Check Foundation
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05
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2017-05-18
2017-05-22
Coordinates
3.9723, 73.4907
Coral cover
20%
Computer vision (20 photos) · details below
Observations
shipwreck
Heat stress
Today’s heat load
16 Sep 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) · Maldives ecoregion mean=2.9°C-heating weeks
Photographs
25
Site summary

A small wreck beside a coral pinnacle, its hull now crusted in coralline algae and cauliflower corals with glassy sweepers packing the passageways; nearby derelict coral-farming tables show mostly dead transplants with a few survivors. Computer vision cover estimate is 18-21%, averaging 19.6%.

Max. depth dived
32.6 m
dive-log maximum

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

Eleven other CRD dive sites within 5 km shown in orange — click a marker to open its page.

10 of these 25 photographs are shown beside the text that discusses them under "Site description" below.

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Photo credit & attribution

Site description

Setting

A small ship sits upright on the sand beside a coral pinnacle, and after years underwater the two have nearly merged: hull plates crusted in pink coralline algae, railings sprouting cauliflower corals, massive mound corals squatting on the deck, and dark passageways packed with shimmering clouds of glassy sweepers (e.g., Image 2, Image 10, Image 12, Image 14).

General benthic features

Just beyond, the pinnacle's shallow crown blazes with healthy table and cauliflower corals (e.g., Image 4, Image 20).

Coral cover

Coral cover: 20% — photo-derived, and the two methods broadly agree (18% vs 21%). This site's figure is the mean of two independent computer vision passes over Anderson's own frames: a DINOv3 calibrated point classifier reads 18.2% and a CoralSCOP computer vision reads 21%, a spread of 2.8 percentage points. The map publishes the mean so sites can be sorted against one another, but the honest statement of what is known here is the 18–21% range: the two products have different denominators and should not be treated as one measurement.

Stressors

There's a bittersweet detail here too: derelict coral-farming tables lie nearby, most of their transplanted fragments long dead, though a few stubborn survivors still hang on (e.g., Image 16, Image 22).

No crown-of-thorns starfish (COTS) or other corallivores evident.

Fish and other fauna

A pair of Moorish idols patrols the wreck, orange anthias swarm the framework, and a huge sea anemone on the structure shelters anemonefish with a single white bar — the Maldives' own species (e.g., Image 5, Image 23).

Comparisons with other data

No independent survey was made at this exact site; the nearest ones are listed in the table below.

CV model comparison

DINOv3 18%, CoralSCOP 21%; the headline is their mean.
More infoAs of September 2026 no computer-vision method estimates coral cover accurately on new images, so treat this as indicative rather than a measurement; it is revised as the methods improve.
The two methods broadly agree (spread 2.8 pp).
More infoThe published figure is the mean of the two methods.
MethodHard-coral cover (%)
In-house DINOv318.2
CoralSCOP21.0
Mean (± SD)19.6 ± 2.0
Range18.2–21.0

Mean ± SD and range are across the computer-vision methods shown.

Independent surveys nearby

Data availability near this site
Agency / programYear(s)Stations / distanceLink
Montefalcone et al. (2020)20151 station, 2.30 kmRecords ↓
Reef Check20221 station, 2.85 kmRecords ↓
XL Catlin Seaview Survey2015–20172 stations, 3.08–3.68 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%201520182022Montefalcone et al. (2020) 2015: 76%XL Catlin Seaview Survey 2015: 7.1%XL Catlin Seaview Survey 2015: 38%XL Catlin Seaview Survey 2017: 5.5%Reef Check 2022: 19%Dr. Coral (CRD) 2017: 20%Year-averaged across all programs: no detectable trend (-2.15 pp per year, not separable from zero; 3 years)
Montefalcone et al. (2020) XL Catlin Seaview Survey Reef Check Dr. Coral (CRD)Year-average (no detectable trend)

Within 5 km, 4 independent survey stations recorded hard coral cover in 5 records between 2015 and 2022. Of the 1 station surveyed in more than one year, 1 changed by less than 5 percentage points between their first and latest surveys. The longest record, transect 37035 (XL Catlin Seaview Survey, 3.08 km away), went from 7.1% in 2015 to 5.5% in 2017. One survey since 2021 recorded 19%. This site's own estimate (20%) is indistinguishable from the recent value (19%): the 0.2-point gap is inside the ±7 percentage-point noise between methods; 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 range is shown. Station names are not dive-site names. Values marked best patch exceed 70%: surveyors usually chose the richest area, so they are not site means.

Independent survey data near this site
AgencySite / locationDateHard coral cover (%)DistanceLink
Montefalcone et al. (2020)Cocoa Corner201576% best patch2.30 kmHeatCRD database
XL Catlin Seaview Surveytransect 370352015–20175.5–7.1% (2 images)3.08 km—
XL Catlin Seaview Surveytransect 37036201538%3.68 km—
Reef CheckGulhi Island Backreef202219%2.85 km—

Data & links

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.