Coral Reef Diagnostics

Indonesia - Komodo NP: Secret Garden

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05
Photo: Anderson Mayfield/Coral Reef Diagnostics
Country
Survey date(s)
2019-01-23
Coordinates
-8.7700, 119.5300
Coral cover
13%
Claude computer vision (39 edited photos) · other methods below
Observations
mortality
Heat stress
Today’s heat load
16 Sep 2026 · No heat stress
5-year thermal stress load
5-year mean max. degree heating weeks (DHW)
2021–2025
NOAA Coral Reef Watch — East Nusa Tenggara 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 infoEast Nusa Tenggara (NOAA CRW virtual station) · Lesser Sunda ecoregion mean=6.9°C-heating weeks
Photographs
41
Site summary
Read this summary in:

Secret Garden is more a soft-coral sand slope than a coral reef, with generally low hard coral cover but a strong critter showing - a school of 7-10 mobula rays circling divers, ghost pipefish disguised as algae, and a huge lionfish-covered Tubastraea colony. A blind Claude computer-vision point count puts coral cover around 13%, though the site itself reads as coral-sparse.

Max. depth dived
29.9 m
Water temp. during survey
26.1°Cii
-1.5°C vs the 2019 mean sea temperature (27.6°C)
ii Dive-computer reading of 79°F, converted; reported to one decimal because the instrument resolved whole degrees Fahrenheit.
More infoNote: NOAA's regional station series averages 1.0°C warmer than the satellite pixel nearest this site (0.8 km away), which is used here instead.

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

5 of these 41 photographs are shown beside the text that discusses them under "Site description" below.

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Photo credit & attribution

Site description

Setting

A highly regarded site for hunting for unusual critters (e.g., Image 2). 5-7 m viz, 25C, mild-medium current.

General benthic features

Pocillopora verrucosa, Pocillopora eydouxi, Pachyseris, Porites, and Acropora all present, though in general coral cover was low, and the site was predominantly a sandy slope covered by soft corals (e.g., Image 3).

Benthos at 22 m looked like Wainilu (sand+soft coral, hard coral virtually absent). Some fungids. Some tiny Pachyseris colonies. Halimeda (algae) common. Monster Tubastrea colony covered in lion fish. More of a reef structure above 14 m, though still generally low average live coral cover (e.g., Image 5).

At 10 m, mostly soft coral with some brain corals and poritids. Much more structure at 5-7 m. Appears to be rocks covered in coral rather than structures of coral origin. At least 8-10 species of soft coral at 5 m, where surge was intense (at base of small island). Carpets of soft corals in 6-7 m (most beautiful part of reef) (e.g., Image 4).

Unknown species of massive coral seen at end of dive (need to check pictures, very interesting).

Coral cover

Coral cover: 13% — a blind Claude computer-vision point count of 39 of Anderson's edited photographs (20 points per photo; water, fish, and obstructions excluded). Other computer-vision methods are listed in the method table. Anderson is still comparing computer-vision models, and these figures will be updated as the methods improve.

Fish and other fauna

School of 7-10 mobular rays (mini-mantas) encircled us nearly the entire time (got some good pictures). Various sorts of ghost pipefish disguised as Halimeda (e.g., Image 1).

Few big fish except for aforementioned mobular rays. Sexy shrimp. Peacock mantis (hidden).

Comparisons with other data

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

Dive record

2019-1-23 dive 2: Secret Garden (#17). 10:52-11:51 (59 min). Max. depth=29.9 m. Temp.=26.1ºC. 30% oxygen.

CV model comparison

As of September 2026 no computer-vision method 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 (Anderson, 2026-09-27: Claude CV is the main coral-cover value).
More infoDINOv3 and CoralSCOP were run on the same photos and are listed for comparison. Coralscapes v2 and v1 were also run but are not shown: Anderson does not consider Coralscapes reliable for these photos. No diver transect exists for this trip, so agreement between the rows is not accuracy, and as of September 2026 no computer-vision method estimates coral cover accurately on new images; treat every row as indicative.
MethodHard-coral cover (%)
In-house DINOv324.9
CoralSCOP edited38.0
Claude (edited photos)12.8

Data & links

All images from Coral Reef Diagnostics. Data are from Coral Reef Diagnostics.

© Coral Reef Diagnostics.