Coral Reef Diagnostics

Bonaire - Wayaka II

Reef Check Foundation
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05
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2017-02-24
Coordinates
12.2690, -68.4140
Coral cover
24%
Claude computer vision (52 edited photos) · other methods below · median 22%
Observations
None tagged; see Stressors below
Heat stress
Most recent heat load record
26 Oct 2026 · Bleaching Warning
5-year thermal stress load
5-year mean max. degree heating weeks (DHW)
2021–2025
NOAA Coral Reef Watch — Aruba, Curacao, and Bonaire 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 infoAruba, Curacao, and Bonaire (NOAA CRW virtual station)
Photographs
58
50 shown on this page
Site summary
Read this summary in:

A steep wall of stacked plate and lettuce corals over massive and brain coral heads, visited by a hawksbill turtle and a spiny lobster. It is a reef of two halves, though: the deeper wall and slope are coral-dense, while the shallows hold an extensive field of old, eroded dead branching coral.

Max. depth dived
35.4 m
dive-log maximum
Water temp. during survey
26.8°C
-1.1°C vs the 2017 mean sea temperature (27.9°C)
Bottom time
48 min
in at 14:21

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

This page shows 50 of the 58 photographs from this site, including every one the text cites.

10 of the 50 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

General benthic features

A steep coral wall with terraces of plate and lettuce corals stacked over massive and brain coral heads, dropping into deep blue water (e.g., Image 2).

Wayaka II spans a steep wall with abundant plate/lettuce corals, a slope dominated by massive/lobate and brain corals (e.g., Image 3, Image 4), and a shallow zone with rubble and extensive dead branching framework (a frame labeled as dead reef) (e.g., Image 51).

Coral cover

Stressors

The strong cross-habitat contrast is important: coral-dense wall and slope images coexist with a visibly degraded shallow framework field. No broad bleaching signal is apparent on the wall or deeper slope, where many colonies retain pigmented tissue; the exception is one bleached plating colony, stark white atop a mound beside olive-brown plates of the same form (e.g., Image 42).

In contrast, one frame shows an extensive shallow field of old, eroded branching coral framework with little visible live coral. This is a meaningful degradation signal, but the photographs alone cannot date the mortality event or determine its cause. No corallivores were evident.

Fish and other fauna

A hawksbill turtle cruised the reef face (e.g., Image 1) and a Caribbean spiny lobster sheltered under a ledge (e.g., Image 17), with a banded coral shrimp (e.g., Image 19), a purple tube-shaped sponge (e.g., Image 40), and a giant anemone (e.g., Image 35) tucked among the coral.

Turtle, parrotfish, lobster, shrimp, and schooling fishes are documented.

Comparisons with other data

Coral cover — external cross-reference (Reef Check). Two independent measurements, reported side by side and deliberately not averaged. Anderson Mayfield / CRD: 24% hard coral (2017). Reef Check: 43% at Twin Peaks, 0.93 km away, in 1998 (50% in 1997; 4 surveys at 3 and 10 m, 1997–1998). The two are 19 years apart (CRD later). Methods differ (CRD photographic/point-count index vs Reef Check point-intercept transect). Reef Check site positions are approximate; at 0.93 km apart the two surveys may have sampled different patches of the same reef, which is the main caveat on this comparison.

CV model comparison

Mean 24%, median 22% across 52 photos.
More infoA few colony-focused photos raise the mean; the median is the typical photo. No computer-vision method yet estimates coral cover accurately on new images, so treat this as indicative rather than a measurement; it is revised as the methods improve.
Headline: Claude computer vision, a blind point count of this site's own photographs.
More infoOther rows are for comparison only and are never averaged. No diver transect exists for these photos, so agreement between rows is not accuracy.
MethodHard coral cover (%)Photos (n) ± SE
CoralSCOP edited24.4n = 58 · SE 2.3
Claude (edited photos)23.8n = 52 · SE 2.8

CoralSCOP (edited photos) reads 24.4%, within 0.6 pp of Claude's blind point count (23.8%).

Independent surveys nearby

Data availability near this site
Agency / programYear(s)Stations / distanceLink
Reef Check1997–20012 stations, 0.93–1.07 kmRecords ↓
XL Catlin Seaview Survey20131 station, 4.24 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%199720072017Reef Check 1997: 50%Reef Check 1998: 43%Reef Check 2001: 14%XL Catlin Seaview Survey 2013: 7.1%Coral Reef Diagnostics 2017: 24%Year-averaged across all programs: illustrative only; the programs differ in stations and method, so no trend is claimed (5 years)
Reef Check XL Catlin Seaview Survey Coral Reef DiagnosticsYear-average (illustrative only, programs differ)

Within 5 km, 3 independent survey stations recorded hard coral cover in 7 surveys between 1997 and 2013. The one station surveyed in more than one year declined by 7.0 points between its first and latest surveys. The longest record, Twin Peaks (Reef Check, 0.93 km away), went from 50% in 1997 (mean of 2 surveys) to 43% in 1998 (mean of 2 surveys). The most recent nearby survey is from 2013, so these values predate recent heat stress. This site's own estimate (24%) sits within the range of these station-year means up to 2 km away (14–50%); 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 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 (%)DistanceLink
Reef CheckTwin Peaks1997–199843–50% (range of yearly means; 4 surveys)0.93 km—
Reef CheckSlagbaii Reserve200114%, mean of 2 surveys (3 m and 10 m)1.07 km—
XL Catlin Seaview Surveytransect 1703220137.1%4.24 kmdoi:10.14264/uql.2019.930

Data & links

All images from Coral Reef Diagnostics. Data are from Coral Reef Diagnostics and the organizations named in the data sources above.

© Coral Reef Diagnostics.