Coral Reef Diagnostics

N. GBR - Pink (AU91113)

Khaled bin Sultan Living Oceans Foundation — Global Reef Expedition
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05
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2014-09-23
Coordinates
-11.3999, 143.9617
Coral cover
38%
Benthic transects+photo-quadrats
Observations
not yet tagged for this site
Heat stress
Today’s heat load
3 Oct 2026 · No heat stress
5-year thermal stress load
5-year mean max. degree heating weeks (DHW)
2021–2025
NOAA Coral Reef Watch — Far Northern GBR 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 infoFar Northern GBR (NOAA CRW virtual station)
Photographs
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Site summary

A dive nearly scuttled by a vicious current that ruled out his surveys and forced a 15-minute fight back to the boat. In the brief window at 5 m, the coral was "beautiful": a tight mosaic of finger Porites, pink Pocillopora, Isopora, and young Acropora (15-20% cover by his estimate; the GRE team's transects recorded 38%), with gray reef sharks cruising past. Surveyed on the Living Oceans Foundation's Global Reef Expedition.

Max. depth dived
20.2 m
dive-log maximum
Sea surface temp. (satellite)
24.7°C
satellite sea surface temperature (SST) on the survey date (NOAA Coral Reef Watch, Far Northern GBR), 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
18 min
in at 11:42

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

5 of the 8 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

Not every dive on the Global Reef Expedition went to plan. This stop at Unnamed Reef 11-091 was nearly scuttled by a vicious current that made formal surveying impossible, and Anderson described a genuinely hairy fifteen-minute fight back to the boat. This reef sits in a Preservation Zone, closed to entry without a permit and to any form of take.

General benthic features

In the brief window he had at around 5 m Anderson called the coral "beautiful," and the photographs support it. One close frame is a tight mosaic of small colonies with almost no gaps: tan finger Porites, pink and mauve Pocillopora, encrusting Isopora, faviids, and blue-tipped Acropora juveniles wedged between them (e.g., Image 2).

Two wider shots show the same assemblage spread over a low, sunlit reef with chromis and anthias above it (e.g., Image 1, Image 4).

A fourth is one sprawling lumpy encrusting colony a couple of meters across (e.g., Image 3).

The fifth looks along the reef edge where cover thins onto pale pavement and rubble before the drop into blue, which is a fair picture of how patchy this reef is away from its best ground (e.g., Image 5).

Coral cover

Stressors

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

Fish and other fauna

A few gray reef sharks cruised through as the team retreated.

Comparisons with other data

No prior survey data from this site. If you would like to share yours, please email us.

Data & links

All images from Coral Reef Diagnostics. Data are from the Khaled bin Sultan Living Oceans Foundation Global Reef Expedition and Coral Reef Diagnostics.

© Coral Reef Diagnostics.