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
Approximate position.
Coral cover
13%
Claude computer vision (39 edited photos) · other methods below · median 6.7%
Observations
None tagged; see Stressors below
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 — 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)
Photographs
47
41 shown on this page
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
26.7°Cii (dive note: 25°C)
-0.9°C vs the 2019 mean sea temperature (27.6°C)
ii Logged water temperature of the dive (dive-computer average), 23 January 2019 (dive log); the dive computer's minimum was 26.1°C, and Anderson's note reads 25°C. Note: NOAA's regional station series averages 1.2°C warmer than the satellite pixel nearest this site (0.8 km away), which is used here instead.
Bottom time
59 min
in at 10:52

11 of the 41 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

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

At the end of the dive we passed a dense field of large, smooth, lobate massive coral colonies, compatible with massive Porites though the corallites cannot be resolved in the photographs (e.g., Image 23, Image 29, Image 34).

Coral cover

Stressors

One table colony has a large, irregular patch of dead, sediment-dusted bare skeleton at its center, with living, pigmented tissue around the rim; the cause is not known (e.g., Image 28).

Fish and other fauna

School of 7-10 mobular rays (mini-mantas) encircled us nearly the entire time (got some good pictures) (e.g., Image 10, Image 25).

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

We found no other surveys at this site as of 2026. If you would like to share yours, please email us.

Dive record

2019-1-23 dive 2: Secret Garden (trip dive 17). 10:52-11:51 (59 min). Max. depth=29.9 m. Average water temperature 26.7°C. 30% oxygen.

CV model comparison

Mean 13%, median 6.7% across 39 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 infoDINOv3 and CoralSCOP were run on the same photos and are listed for comparison. No diver transect exists for this trip, so agreement between the rows is not accuracy, and no computer-vision method yet estimates coral cover accurately on new images; treat every row as indicative.
MethodHard coral cover (%)Photos (n) ± SE
In-house DINOv324.9n = 39 · SE 1.9
CoralSCOP edited38.0n = 39 · SE 3.9
Claude (edited photos)12.8n = 39 · SE 2.4

The two computer-vision methods disagree by 13.1 pp (24.9–38.0%) and read 12.1–25.2 pp above Claude's blind point count (12.8%); the headline is Claude's blind point count because no transect or manual count exists here.

Data & links

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

© Coral Reef Diagnostics.