Coral Reef Diagnostics

Maldives - Back Faru

Reef Check Foundation
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05
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2017-05-14
2017-05-21
Coordinates
4.2397, 73.5544
Coral cover
14%
Computer vision (20 photos) · details below
Observations
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 reef caught mid-recovery a year after 2016 bleaching: coralline-algae-capped dead framework and lingering crown-of-thorns scars alongside actively recruiting cauliflower corals and surviving dome corals. Cover is modest at a computer-vision-estimated 14.2%.

Max. depth dived
31.0 m
dive-log maximum

Five 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.

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

2456710111314151719212224

Photo credit & attribution

Site description

General benthic features

But look closer: knee-high cauliflower corals compatible with Pocillopora are recruiting everywhere across the rubble (e.g., Image 8), massive dome corals soldier on (e.g., Image 18), and the fish never left.

Coral cover

Coral cover: 14% — photo-derived, and the two methods broadly agree (14% vs 15%). This site's figure is the mean of two independent computer vision passes over Anderson's own frames: a DINOv3 calibrated point classifier reads 13.9% and a CoralSCOP computer vision reads 14.6%, a spread of 0.7 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 14–15% range: the two products have different denominators and should not be treated as one measurement.

Stressors

A year after the 2016 bleaching, whole terraces of dead framework here have been shrink-wrapped in pink crustose coralline algae (e.g., Image 1, Image 3) — nature's primer coat — with dead table corals still standing like abandoned furniture (e.g., Image 12) and crown-of-thorns seastars (plus their fresh feeding scars) hiding in the wreckage.

Fish and other fauna

Dense black schools boil over the slope (e.g., Image 16), a titan-type triggerfish patrols the rubble (e.g., Image 9), morays — including a gape-jawed honeycomb moray — thread the crevices (e.g., Image 23, Image 25), and the macro hunt turns up a banded boxer shrimp (e.g., Image 20), Clark's-type anemonefish in a red-lipped anemone, and a giant clam flashing a blue-violet mantle.

Comparisons with other data

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

Dive record

Dived three times across the trip, Back Faru reads like a field report on how a Maldivian reef rebuilds.

CV model comparison

DINOv3 14%, CoralSCOP 15%; 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 0.7 pp).
More infoThe published figure is the mean of the two methods.
MethodHard-coral cover (%)
In-house DINOv313.9
CoralSCOP14.6
Mean (± SD)14.2 ± 0.5
Range13.9–14.6

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)2015–20192 stations, 0.62–2.91 kmRecords ↓
Reef Check2010–20192 stations, 1.15–2.52 kmRecords ↓
XL Catlin Seaview Survey2015–20171 station, 2.81 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%12%24%36%48%201020142019Reef Check 2010: 33%Reef Check 2014: 16%Reef Check 2019: 7.2%Montefalcone et al. (2020) 2015: 40%Montefalcone et al. (2020) 2015: 41%Montefalcone et al. (2020) 2016: 15%Montefalcone et al. (2020) 2016: 16%Montefalcone et al. (2020) 2018: 12%Montefalcone et al. (2020) 2019: 19%XL Catlin Seaview Survey 2015: 14%XL Catlin Seaview Survey 2017: 1.8%Dr. Coral (CRD) 2017: 14%Year-averaged across all programs: decreasing (-2.46 pp per year; 7 years)
Reef Check Montefalcone et al. (2020) XL Catlin Seaview Survey Dr. Coral (CRD)Year-average (decreasing)

Within 5 km, 5 independent survey stations recorded hard coral cover in 12 records between 2010 and 2019. Of the 4 stations surveyed in more than one year, 4 declined between their first and latest surveys. The longest record, Banana Reef (Montefalcone et al. 2020, 2.91 km away), went from 40% in 2015 to 19% in 2019. The most recent nearby survey is from 2019, so these values predate recent heat stress. This site's own estimate (14%) sits within the range of these surveys (1.8–41%); 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.

Independent survey data near this site
AgencySite / locationDateHard coral cover (%)DistanceLink
Reef CheckBanana Reef2010–201416–33% (2 surveys)1.15 km—
Montefalcone et al. (2020)Hulumale Beyru2015–201615–41% (2 surveys)0.62 kmHeatCRD database
XL Catlin Seaview Surveytransect 370012015–20171.8–14% (2 images)2.81 km—
Montefalcone et al. (2020)Banana Reef2015–201912–40% (4 surveys)2.91 kmHeatCRD database
Reef CheckKuda Banana Reef20197.2% (2 surveys)2.52 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.