Coral Reef Diagnostics

Fiji - Fulaga

Khaled bin Sultan Living Oceans Foundation — Global Reef Expedition

Island summary of 6 dive sites. Figures are averages across the sites that report them (n = sites with a value); each site's own page has its individual values. Part of the Fiji - Southern Lau (Kabara / Fulaga) regional summary.

⬇ Download this island as a report card
05
Country
Sites
6
each linked below
Hard coral cover (island mean)
44% ± 7.6% (std. dev.)
n=6. range 35–55%
Water temp. during surveys (island mean)
26.4°C
n = 6 of 6 sites; surveyed Jun 2013; all are station CTD values, not dive readings
Coral Health Index (island mean)
not yet scored
n = 0 of 6 sites
Most recent water temperature record
26 Oct 2026 · Fiji
Most recent heat stress record
26 Oct 2026 · No heat stress
Mean annual max degree heating weeks (DHW), last 5 years
2021–2025 · Fiji
Highest annual heat stress
in 2026 (to date, 26 Oct) · Fiji
Severe heat-stress years
1985–2025 · 6 in the last 10 years
Heat-stress figures: NOAA Coral Reef Watch — Fiji 5-km virtual station. Each pill links its source record and carries the values behind it.
Island summary

Fulaga's deep spur-and-groove fore reef, near-vertical wall, and lagoon pinnacles held 35-55% coral in June 2013, including 50% at a station dived to only 4 m.

Heat stress

048121620Week of 2023-01-01: DHW 2.6°C-weeks (below the bleaching alert threshold); SST 28.68°CWeek of 2023-01-08: DHW 3.5°C-weeks (below the bleaching alert threshold); SST 29.25°CWeek of 2023-01-15: DHW 4.9°C-weeks (Alert Level 1: significant bleaching likely); SST 28.95°CWeek of 2023-01-22: DHW 6.6°C-weeks (Alert Level 1: significant bleaching likely); SST 29.10°CWeek of 2023-01-29: DHW 8.5°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.52°CWeek of 2023-02-05: DHW 10.0°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.33°CWeek of 2023-02-12: DHW 11.1°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.74°CWeek of 2023-02-19: DHW 12.2°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.70°CWeek of 2023-02-26: DHW 12.4°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.57°CWeek of 2023-03-05: DHW 12.3°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.55°CWeek of 2023-03-12: DHW 12.3°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.70°CWeek of 2023-03-19: DHW 12.1°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.36°CWeek of 2023-03-26: DHW 12.4°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.80°CWeek of 2023-04-02: DHW 12.7°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.55°CWeek of 2023-04-09: DHW 12.5°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.74°CWeek of 2023-04-16: DHW 11.7°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.51°CWeek of 2023-04-23: DHW 10.0°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.31°CWeek of 2023-04-30: DHW 8.1°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.97°CWeek of 2023-05-07: DHW 6.6°C-weeks (Alert Level 1: significant bleaching likely); SST 28.82°CWeek of 2023-05-14: DHW 5.6°C-weeks (Alert Level 1: significant bleaching likely); SST 28.70°CWeek of 2023-05-21: DHW 4.4°C-weeks (Alert Level 1: significant bleaching likely); SST 28.51°CWeek of 2023-05-28: DHW 3.4°C-weeks (below the bleaching alert threshold); SST 28.58°CWeek of 2023-06-04: DHW 3.1°C-weeks (below the bleaching alert threshold); SST 28.02°CWeek of 2023-06-11: DHW 3.1°C-weeks (below the bleaching alert threshold); SST 27.88°CWeek of 2023-06-18: DHW 2.8°C-weeks (below the bleaching alert threshold); SST 27.45°CWeek of 2023-06-25: DHW 1.7°C-weeks (below the bleaching alert threshold); SST 27.18°CWeek of 2023-07-02: DHW 0.6°C-weeks (below the bleaching alert threshold); SST 27.26°CWeek of 2024-01-07: DHW 0.1°C-weeks (below the bleaching alert threshold); SST 29.47°CWeek of 2024-01-14: DHW 0.6°C-weeks (below the bleaching alert threshold); SST 29.58°CWeek of 2024-01-21: DHW 2.0°C-weeks (below the bleaching alert threshold); SST 29.63°CWeek of 2024-01-28: DHW 3.3°C-weeks (below the bleaching alert threshold); SST 29.33°CWeek of 2024-02-04: DHW 4.6°C-weeks (Alert Level 1: significant bleaching likely); SST 29.47°CWeek of 2024-02-11: DHW 6.0°C-weeks (Alert Level 1: significant bleaching likely); SST 29.35°CWeek of 2024-02-18: DHW 6.7°C-weeks (Alert Level 1: significant bleaching likely); SST 29.12°CWeek of 2024-02-25: DHW 8.4°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.57°CWeek of 2024-03-03: DHW 10.0°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.13°CWeek of 2024-03-10: DHW 11.2°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.98°CWeek of 2024-03-17: DHW 11.8°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.02°CWeek of 2024-03-24: DHW 13.0°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.63°CWeek of 2024-03-31: DHW 13.3°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.28°CWeek of 2024-04-07: DHW 13.3°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.20°CWeek of 2024-04-14: DHW 12.7°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.32°CWeek of 2024-04-21: DHW 11.3°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.52°CWeek of 2024-04-28: DHW 10.4°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.98°CWeek of 2024-05-05: DHW 9.1°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.00°CWeek of 2024-05-12: DHW 7.8°C-weeks (Alert Level 1: significant bleaching likely); SST 28.44°CWeek of 2024-05-19: DHW 7.0°C-weeks (Alert Level 1: significant bleaching likely); SST 28.66°CWeek of 2024-05-26: DHW 5.3°C-weeks (Alert Level 1: significant bleaching likely); SST 28.43°CWeek of 2024-06-02: DHW 3.7°C-weeks (below the bleaching alert threshold); SST 27.74°CWeek of 2024-06-09: DHW 2.6°C-weeks (below the bleaching alert threshold); SST 27.27°CWeek of 2024-06-16: DHW 1.9°C-weeks (below the bleaching alert threshold); SST 27.27°CWeek of 2024-06-23: DHW 0.8°C-weeks (below the bleaching alert threshold); SST 27.37°CWeek of 2024-06-30: DHW 0.5°C-weeks (below the bleaching alert threshold); SST 27.26°CWeek of 2024-07-07: DHW 0.5°C-weeks (below the bleaching alert threshold); SST 27.09°CWeek of 2024-07-14: DHW 0.5°C-weeks (below the bleaching alert threshold); SST 26.73°CWeek of 2025-01-19: DHW 1.2°C-weeks (below the bleaching alert threshold); SST 29.36°CWeek of 2025-01-26: DHW 2.0°C-weeks (below the bleaching alert threshold); SST 28.87°CWeek of 2025-02-02: DHW 2.0°C-weeks (below the bleaching alert threshold); SST 28.85°CWeek of 2025-02-09: DHW 3.4°C-weeks (below the bleaching alert threshold); SST 29.33°CWeek of 2025-02-16: DHW 4.6°C-weeks (Alert Level 1: significant bleaching likely); SST 28.71°CWeek of 2025-02-23: DHW 5.3°C-weeks (Alert Level 1: significant bleaching likely); SST 28.89°CWeek of 2025-03-02: DHW 5.3°C-weeks (Alert Level 1: significant bleaching likely); SST 28.73°CWeek of 2025-03-09: DHW 5.3°C-weeks (Alert Level 1: significant bleaching likely); SST 28.73°CWeek of 2025-03-16: DHW 5.6°C-weeks (Alert Level 1: significant bleaching likely); SST 28.66°CWeek of 2025-03-23: DHW 5.7°C-weeks (Alert Level 1: significant bleaching likely); SST 28.71°CWeek of 2025-03-30: DHW 6.8°C-weeks (Alert Level 1: significant bleaching likely); SST 29.63°CWeek of 2025-04-06: DHW 7.9°C-weeks (Alert Level 1: significant bleaching likely); SST 29.63°CWeek of 2025-04-13: DHW 8.0°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.33°CWeek of 2025-04-20: DHW 7.1°C-weeks (Alert Level 1: significant bleaching likely); SST 29.51°CWeek of 2025-04-27: DHW 7.1°C-weeks (Alert Level 1: significant bleaching likely); SST 28.95°CWeek of 2025-05-04: DHW 7.0°C-weeks (Alert Level 1: significant bleaching likely); SST 28.63°CWeek of 2025-05-11: DHW 5.6°C-weeks (Alert Level 1: significant bleaching likely); SST 28.27°CWeek of 2025-05-18: DHW 4.3°C-weeks (Alert Level 1: significant bleaching likely); SST 28.15°CWeek of 2025-05-25: DHW 3.8°C-weeks (below the bleaching alert threshold); SST 28.33°CWeek of 2025-06-01: DHW 3.8°C-weeks (below the bleaching alert threshold); SST 28.05°CWeek of 2025-06-08: DHW 3.8°C-weeks (below the bleaching alert threshold); SST 27.71°CWeek of 2025-06-15: DHW 3.6°C-weeks (below the bleaching alert threshold); SST 27.67°CWeek of 2025-06-22: DHW 3.3°C-weeks (below the bleaching alert threshold); SST 27.33°CWeek of 2025-06-29: DHW 2.2°C-weeks (below the bleaching alert threshold); SST 27.27°CWeek of 2025-07-06: DHW 1.1°C-weeks (below the bleaching alert threshold); SST 27.02°CWeek of 2025-07-13: DHW 0.7°C-weeks (below the bleaching alert threshold); SST 26.86°CWeek of 2026-01-18: DHW 1.2°C-weeks (below the bleaching alert threshold); SST 28.99°CWeek of 2026-01-25: DHW 2.5°C-weeks (below the bleaching alert threshold); SST 28.85°CWeek of 2026-02-01: DHW 4.2°C-weeks (Alert Level 1: significant bleaching likely); SST 29.25°CWeek of 2026-02-08: DHW 5.7°C-weeks (Alert Level 1: significant bleaching likely); SST 29.38°CWeek of 2026-02-15: DHW 7.5°C-weeks (Alert Level 1: significant bleaching likely); SST 29.58°CWeek of 2026-02-22: DHW 9.2°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.36°CWeek of 2026-03-01: DHW 10.5°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.77°CWeek of 2026-03-08: DHW 12.2°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.37°CWeek of 2026-03-15: DHW 13.8°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.55°CWeek of 2026-03-22: DHW 15.3°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.32°CWeek of 2026-03-29: DHW 16.4°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.99°CWeek of 2026-04-05: DHW 16.7°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.86°CWeek of 2026-04-12: DHW 16.7°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.31°CWeek of 2026-04-19: DHW 15.3°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.07°CWeek of 2026-04-26: DHW 13.9°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 29.06°CWeek of 2026-05-03: DHW 12.3°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.91°CWeek of 2026-05-10: DHW 10.8°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.68°CWeek of 2026-05-17: DHW 9.0°C-weeks (Alert Level 2+: severe bleaching and significant mortality likely); SST 28.45°CWeek of 2026-05-24: DHW 7.3°C-weeks (Alert Level 1: significant bleaching likely); SST 28.19°CWeek of 2026-05-31: DHW 6.0°C-weeks (Alert Level 1: significant bleaching likely); SST 27.84°CWeek of 2026-06-07: DHW 4.3°C-weeks (Alert Level 1: significant bleaching likely); SST 27.53°CWeek of 2026-06-14: DHW 2.7°C-weeks (below the bleaching alert threshold); SST 27.10°CWeek of 2026-06-21: DHW 1.2°C-weeks (below the bleaching alert threshold); SST 26.59°CWeek of 2026-06-28: DHW 0.2°C-weeks (below the bleaching alert threshold); SST 26.25°C24262830Bleaching threshold 29.4°C2023202420252026SST (°C)DHW (°C-weeks)
sea surface temperature (SST) (left axis)DHW under 2DHW 2–3DHW 3–5DHW 5–8DHW 8–10DHW over 10 (🔥 above 12)
Daily SST (line) and weekly maximum Degree Heating Weeks (bars), Jan 2023–Oct 2026, NOAA Coral Reef Watch 5-km Fiji virtual station. Dashed line: bleaching threshold (maximum monthly mean 28.4°C + 1°C). DHW ≥ 4: bleaching likely; ≥ 8: severe bleaching and mortality likely. A bar is drawn only where DHW exceeds zero, so a stretch with no bar is accumulated heat stress of zero, not missing data — the SST line runs the full period.

Long-term record: 11 years from 1985 through 2025 reached 8 or more °C-weeks at NOAA’s Fiji station. Download the annual DHW data (CSV).

6 sites in this region — click a marker to open that site.

Overview

Six Global Reef Expedition stations were surveyed at Fulaga, in southern Lau, on 11 and 12 June 2013. Maximum depths dived ran from 4 m at FJFU29 (Anderson's own sampling dive) to 29 m at FJFU25. The majority are fore-reef stations, but the set also includes three stations inside Fulaga's enclosed lagoon: FJFU24, FJFU28, where large coral pinnacles rise from a sandy floor with tops dominated by Pocillopora, Acropora, and Stylophora, and FJFU29, where Anderson sampled three Pocillopora acuta colonies.

The survey notes describe the Fulaga fore reef as spur-and-groove, with single-species stands of plating and foliose corals on gentler slopes and encrusting, laminar growth where the slope nears vertical. FJFU25 is a near-vertical face with foliose corals under overhangs and table and branching Acropora packed along the reef edge. Coral cover ran from 35% at FJFU25 to 55% at FJFU26, with 43% at FJFU24, 50% at FJFU29, and 44% at FJFU28, the three lagoon stations.

Island-level physiological screening (Mayfield et al. 2017, PLoS ONE) flagged 1 of the 6 corals with an outlier score as an outlier. A single stark-white branching colony appears in one FJFU25 frame, and Anderson's sampling sheet records one colony sampled there as mostly bleached or very pale, with smaller pale or bleached patches on the three colonies sampled at FJFU29 (F55 partially bleached, 20%; the other two less than 10% and 10–15% pale) and some white branch tips on the one colony sampled at FJFU27 (F53). No crown-of-thorns or disease is recorded.

Highlights

Notable observations

Sites in this region

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

© Coral Reef Diagnostics.

References