Coral Reef Diagnostics

Maldives - Kandooma Thila

Reef Check Foundation
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05
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2017-05-19
2017-05-22
Coordinates
3.9036, 73.4737
Coral cover
10%
Computer vision (19 photos) · details below
Observations
not yet tagged for this site
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 current-swept pinnacle known for parades of gray reef sharks, barracuda walls, and unicornfish squadrons rather than its coral, which computer vision puts at roughly 10% cover (methods disagree, 7.0-13%).

Max. depth dived
31.1 m
dive-log maximum

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

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

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

38171920

Photo credit & attribution

Site description

Setting

Kandooma Thila is where the current does the introductions.

General benthic features

On the reef itself, pink coralline crusts and dark coral bushes frame the residents — a big turtle wedged in asleep, a striped oriental sweetlips with buttercup fins, a grumpy puffer parked between the branches, and a massive dome coral that has clearly seen decades of currents like today's (e.g., Image 9, Image 12, Image 14, Image 15, Image 16, Image 18, Image 21).

Coral cover

Coral cover: 10% — photo-derived, and the two methods broadly agree (13% vs 7.3%). This site's figure is the mean of two independent computer vision passes over Anderson's own frames: a DINOv3 calibrated point classifier reads 13.2% and a CoralSCOP computer vision reads 7.3%, a spread of 5.9 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 7.3–13% range: the two products have different denominators and should not be treated as one measurement. He is actively comparing CoralSCOP and DINOv3 against newer CV models and will swap in an updated figure here once a more reliable model is found.

Stressors

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

Fish and other fauna

Two dives here — one at first light, one in afternoon glass — produced a parade of gray reef sharks, from hazy dawn silhouettes to a spotlight-crisp frontal pass, one shark trailing a retinue of little jacks (e.g., Image 4, Image 5, Image 22, Image 10, Image 24, Image 25, Image 11).

The pinnacle's edges churned with life: a chevron wall of barracuda, horned unicornfish squadrons, dense blue riverine schools of fusiliers, and surgeonfish darting up to chase divers' bubbles (e.g., Image 6, Image 1, Image 2, Image 7, Image 13, 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 13%, CoralSCOP 7.3%; 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 5.9 pp).
More infoThe published figure is the mean of the two methods.
MethodHard-coral cover (%)
In-house DINOv313.2
CoralSCOP7.3
Mean (± SD)10.2 ± 4.2
Range7.3–13.2

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)2015–20194 stations, 0.81–3.76 kmRecords ↓
Re E.*20261 station, 2.11 kmRecords ↓
Reef Check2012–202510 stations, 0.48–3.54 kmRecords ↓
XL Catlin Seaview Survey20151 station, 4.85 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%22%44%66%88%201220192026Reef Check 2012: 18%Reef Check 2017: 21%Reef Check 2018: 8.8%Reef Check 2018: 18%Reef Check 2019: 20%Reef Check 2019: 24%Reef Check 2019: 28%Reef Check 2019: 30%Reef Check 2022: 16%Reef Check 2022: 20%Reef Check 2024: 25%Reef Check 2024: 31%Reef Check 2025: 25%Reef Check 2025: 26%Reef Check 2025: 27%Montefalcone et al. (2020) 2015: 51%Montefalcone et al. (2020) 2015: 83%Montefalcone et al. (2020) 2016: 7.7%Montefalcone et al. (2020) 2016: 12%Montefalcone et al. (2020) 2016: 18%Montefalcone et al. (2020) 2017: 8.0%Montefalcone et al. (2020) 2017: 45%Montefalcone et al. (2020) 2018: 17%Montefalcone et al. (2020) 2018: 19%Montefalcone et al. (2020) 2019: 34%Montefalcone et al. (2020) 2019: 38%XL Catlin Seaview Survey 2015: 38%Re E.* 2026: 29%Dr. Coral (CRD) 2017: 10%Year-averaged across all programs: no detectable trend (+0.01 pp per year, not separable from zero; 10 years)
Reef Check Montefalcone et al. (2020) XL Catlin Seaview Survey Re E.* Dr. Coral (CRD)Year-average (no detectable trend)

Within 5 km, 16 independent survey stations recorded hard coral cover in 47 records between 2012 and 2026. Of the 9 stations surveyed in more than one year, 2 declined, 3 increased, and 4 changed by less than 5 percentage points between their first and latest surveys. The longest record, Guraidhoo backreef (Reef Check, 1.81 km away), went from 28% in 2019 to 25% in 2025. Surveys since 2021 average 25% (range 16–31%, n=10). This site's own estimate (10%) is indistinguishable from the recent range (16–31%): the 5.4-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. *Conducted by citizen scientists), 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.

Show all 16 independent survey records
Independent survey data near this site
AgencySite / locationDateHard coral cover (%)DistanceLink
Reef CheckBiyadhoo House Reef201218% (3 surveys)3.22 km—
Montefalcone et al. (2020)Villivaru Kuda Giri2015–20198.0–51% (4 surveys)3.76 kmHeatCRD database
Montefalcone et al. (2020)Guraidhoo Kuda Giri2015–201612–83% (2 surveys) best patch3.76 kmHeatCRD database
XL Catlin Seaview Surveytransect 37036201538%4.85 km—
Montefalcone et al. (2020)Kandooma Beyru2016–20197.7–34% (3 surveys)0.81 kmHeatCRD database
Montefalcone et al. (2020)Maadhu Faru Beyru2016–201718–45% (2 surveys)1.57 kmHeatCRD database
Reef CheckGuraidhoo Corner201721% (2 surveys)1.75 km—
Reef CheckKandooma Beyru2018–201918–30% (4 surveys)0.48 km—
Reef CheckVillivaru Giri20188.8% (2 surveys)3.21 km—
Reef CheckGuraidhoo backreef2019–202520–28% (6 surveys)1.81 km—
Reef CheckGuridhoo outer2019–202216–20% (3 surveys)2.08 km—
Reef CheckVillivaru Kuda Giri201924% (2 surveys)3.54 km—
Reef CheckGuraidhoo Backreef202431% (2 surveys)1.82 km—
Reef CheckGuraidhoo Banana2024–202525–27% (4 surveys)1.88 km—
Reef CheckGuraidhoo Forereef2024–202525–26% (4 surveys)2.20 km—
Re E.*Banana_Reef202629% (3 images)2.11 kmRe E. 2026. AquaReef Project - Maldives. MERMAID

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.