Coral Reef Diagnostics

Fiji - Vanua Balavu (FJVB62)

Khaled bin Sultan Living Oceans Foundation — Global Reef Expedition
⬇ Download this page as a report card
05
Outlier score: 3.89/5 (Vanua Balavu, n = 18 corals with an outlier score). The share of those corals whose molecular stress profile was an outlier, rescaled to 0-5 (5 = no outliers); an island-level measure (Mayfield et al. 2017), not a Coral Health Index.
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2013-06-23
2013-06-24
Coordinates
-17.2824, -178.9267
Coral cover
30%
± 4.5% SE, n = 4 transects · Benthic transects+photo-quadrats
Observations
bleachingcyanobacteria
Heat stress
Most recent heat load record
26 Oct 2026 · No heat stress
5-year thermal stress load
5-year mean max. degree heating weeks (DHW)
2021–2025
NOAA Coral Reef Watch — Fiji 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 infoFiji (NOAA CRW virtual station)
Photographs
25
24 shown on this page
Site summary
Read this summary in:

A Vanua Balavu site dived twice, with milky, silty water over sand and rubble patched with algae-crusted framework, and a reef shark cruising low. The close-ups are the highlight: a fully pigmented massive coral seen polyp by polyp and a large mauve anemone (Anderson's identification) ringed with pale tentacles, at 30% cover. Surveyed on the Living Oceans Foundation's Global Reef Expedition.

Max. depth dived
18.3 m
dive-log maximum (23 Jun 2013 dive)
Water temp. during survey
27.0°Cii
CTD-cast midpoint of 26.9–27.0°C; 23 Jun 2013 dive
-0.8°C vs the 2013 mean sea temperature (27.8°C)
ii Station CTD-cast midpoint (LOF station records), not a dive reading: CTD cast of 23 June 2013, the first of the two visits (Living Oceans Foundation Fiji station records); range 26.94–27.01°C; the 24 June 2013 cast's midpoint was 26.9°C (range 26.84–26.89°C).
Bottom time
57 min
in at 15:40; 23 Jun 2013 dive

One other CRD dive site with its own page within 5 km shown in orange — click a marker to open its page.

16 of the 24 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

FJVB62 sits on the Vanua Balavu lagoon and was worked over two days, 23-24 June 2013, during the Khaled bin Sultan Living Oceans Foundation Global Reef Expedition; the dive reached 18.3 m. Visibility was clearly poor, which is probably why the camera went to macro.

General benthic features

The only two frames with any spatial reach look down through a milky, sediment-laden water column onto pale sand and rubble patched with dark algal-crusted framework, a reef shark cruising low across both and a yellow damselfish holding near the reef edge (e.g., Image 15, Image 21); they are too hazy to settle relief, zonation, or how the coral is distributed here.

The close-ups record what was present rather than how much of it. Image 22 fills entirely with the surface of a massive coral head, hundreds of round, evenly spaced, fully pigmented corallites in orange and olive-green, each with a pale central mouth; Anderson identified the colony as Diploastrea (a field identification).

Image 25 and Image 23, identified as bubble coral, show its vesicles inflated over framework crusted with pink coralline algae, green segmented calcareous algae, and green algal tufts.

Coral cover

Stressors

No lesions or crown-of-thorns damage appears on the corals in these frames, but a handful of subject portraits and two turbid wide shots cannot support a site-wide condition assessment. Anderson's sample sheet records two of the four colonies sampled here as partly pale (F136 '20% pale/bleached though likely healthy'; F137 '30% pale', its bleached part sampled), and the frames of F137 show that paling, with pale pink-white outer branches over brown interiors (e.g., Image 8, Image 9, Image 10).

The one coral colony from this site with an outlier score was not flagged as a physiological outlier (Mayfield et al. 2017, PLoS ONE). The Living Oceans Foundation transects here recorded 8.0% cyanobacteria and no recently dead coral.

Fish and other fauna

Image 16, Image 19, Image 18, and Image 17 are four frames of one large fleshy anemone — Anderson's word for it — a smooth mauve-gray fluted disc with a raised central mouth ringed by blunt pale tentacles over a dark oral disc speckled with pale tubercles, worked from several angles and distances.

Image 24 is a spotted sea cucumber lying across red-crusted framework with green algal growth around it.

Comparisons with other data

Apart from the Living Oceans Foundation survey shown here, we found no other surveys at this site as of 2026. If you would like to share yours, please email us.

Dive record

FJVB62 was dived twice, and the photographs from it swing between very tight and very wide.

Other notes

The photographs are a macro set, not a survey set: near-identical anemone frames and a Diploastrea close-up would misrepresent the reef if read as a sample of it. Four Pocillopora colonies were sampled here, F135, F136, F137, and F138, the last labeled P. acuta in Anderson's own records; one of them, F136, was host to a small commensal crab photographed three times among its branches (e.g., Image 5, Image 6, Image 7).

Those colony frames describe the colonies, not the reef.

Dive history

DateTime inMax depth (m)Bottom time (min)
2013-06-2315:4018.357
2013-06-2410:46——

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.