Coral Reef Diagnostics

Maldives - North Ari Atoll

Reef Check Foundation
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05
Country
Date(s) visited
2017-05-25
2017-05-26
Coordinates
4.1000, 72.8200
Approximate position.
Coral cover
—
not yet measured
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)
Site summary
Read this summary in:

A pin at the northern end of Ari Atoll with no photographs or survey of its own. Nearby Reef Check records from 2006-2025 average about 23% coral cover and include some very low stations in single digits, with the 2016 mass bleaching falling inside that window.

Sea surface temp. (satellite)
29.6°C
mean; range 29.5–29.6°C
satellite sea surface temperature (SST), mean of the 2 trip dates (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

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

Site description

Setting

This site marks the northern end of Ari Atoll in the central-western Maldives (4.10 N, 72.82 E).

Stressors

As archipelago context and not an observation here, Maldivian reefs sustained heavy mortality in the 1998 and 2016 mass-bleaching events; the 2016 event falls inside this 2006-2025 survey window, while 1998 predates every record here. Satellite five-year mean annual maximum heat stress at NOAA Coral Reef Watch's Maldives virtual station: 2.2 degree heating weeks.

Comparisons with other data

Regional context: nine independent Reef Check station-year records within 10 km (20 surveys at four stations), spanning 2006-2025, ranging from 1.9% to 44% hard coral and averaging 23%. The nearest is Maaya Thila, 4.78 km away, at 5.6% in 2006. Both the nearest value and the set minimum sit in single digits, which is worth stating plainly: whatever the reef at this site looks like, the surrounding-area record includes some very low-cover stations.

Other notes

This area marker carries no photographs or cover figure of its own: our northern Ari Atoll dives of 25-26 May 2017 are on their own site pins (Fesdhoo wreck and Fish House), and no survey sits close enough to describe this reef.

Independent surveys nearby

Within 5 km, 1 independent survey station recorded hard coral cover in 2006. The most recent nearby survey is from 2006, so these values predate recent heat stress.

Collected by other programs using different methods (Reef Check uses point-intercept transects), 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.

Independent survey data near this site
AgencySite / locationDateHard coral cover (%)Distance
Reef CheckMaaya Thila20065.6%4.78 km

Data & links

Data on this page are from the organizations named in the data sources above, not Coral Reef Diagnostics; Coral Reef Diagnostics has no coral cover estimate of its own at this site.

© Coral Reef Diagnostics.