Indonesia - Komodo NP: Loh Sera
Part of the regional summary: Indonesia - Komodo
More info
East Nusa Tenggara (NOAA CRW virtual station)Loh Sera is a fringing reef of foliaceous coral sheets and swaths of Acropora, which dominate the shallows, in clear, calm water, with high overall coral diversity, but numerous large Seriatopora caliendrum colonies were found partially bleached at their tips — a notable stressor Anderson flagged as unclear in cause. Garbage covered the surface, and a shoe and a plastic bag lay on the reef itself. A blind Claude computer-vision point count puts coral cover around 30%.
Loh Sera adalah terumbu tepi dengan lembaran karang foliasea dan hamparan Acropora, yang mendominasi perairan dangkal, di perairan jernih dan tenang, dengan keanekaragaman karang yang tinggi secara keseluruhan; namun banyak koloni besar Seriatopora caliendrum ditemukan memutih sebagian di ujung-ujungnya — sebuah pemicu tekanan yang menonjol dan yang penyebabnya Anderson catat sebagai belum jelas. Sampah menutupi permukaan laut, dan sebuah sepatu serta kantong plastik tergeletak di atas terumbu itu sendiri. Penghitungan titik buta visi komputer Claude memperkirakan tutupan karang sekitar 30%.
Terjemahan ringkasan ini oleh AI; versi bahasa Inggris yang berlaku.
One independent survey station shown with the program’s logo — click one to see how far it is from this site.
This page shows 50 of the 159 photographs from this site, including every one cited by image number in the text; the frames the text describes as not shown are not among them.
8 of the 50 photographs on this page are shown beside the text that discusses them under "Site description" below.
Site description
Setting
A fringing reef dived at low tide. Corals were exposed to air. Visibility was 10 m with no current.
General benthic features
The dive descended onto sheets of foliaceous corals (unsure of species), as well as vast swaths of Acropora, which dominated the shallows at all parts of dive (e.g., Image 5).
Still, soft corals tended to dominate in many areas. Anderson also saw Anacropora, the first of the trip. Pachyseris and other foliaceous corals common from 2 m to surface, though branching Acropora were the dominant shallow coral. Hydnophora was common at 1 m in many places. Finger Porites, Porites rus, and some small massive poritids, though this was not a reef built by Porites (e.g., Image 4).
Seriatopora hystrix, Pocillopora acuta, and Pocillopora verrucosa were all common. Little coral below 17-18 m: just sand. Stylophora pistillata was present. Galaxea relatively common (e.g., Image 1).
A small wrecked fishing boat, covered in soft and hard corals, was beautiful (e.g., Image 3).
Acropora, Pocillopora acuta, Pocillopora verrucosa, Pachyseris, and 5-10 other species (at least) on the wreck. High Acropora diversity and cover at site. Euphyllia, Merulina, Plerogyra, Fungia.
Coral cover
- Reference: Claude CV point count (this site's photos)
- Coral cover: 30% — a blind Claude computer-vision point count of 118 of Anderson's edited photographs (20 points per photo; water, fish, and obstructions excluded). Other computer-vision methods are listed in the method table.
Stressors
Anderson's log records numerous large, bleached Seriatopora caliendrum colonies with live tissue and notes that the cause was unclear. Bleached Seriatopora caliendrum was also found on the wreck. Nearly all Seriatopora caliendrum was partially bleached at the top, with the bottoms of the branches still pigmented (e.g., Image 19, Image 45).
The last frame of the dive shows a sharply bounded dead patch in a lavender fine-branching colony, part stark-white bare branches and part already filmed with green algae: recent mortality, cause not stated (e.g., Image 51).
The surface was covered in garbage (Anderson's log), and there was debris on the reef itself: one frame shows a shoe on the sand (e.g., Image 52), and another frame shows a clear plastic bag caught in a live branching thicket (photo not shown).
No crown-of-thorns starfish (COTS) or other corallivores were evident.
Fish and other fauna
One new nudibranch. Golden sweepers.
Comparisons with other data
We found no other surveys at this site as of 2026. Within 5 km, one independent station, WWF-US / WWF-Indonesia at TNK11, 3.35 km away, read 26% in 2016.
Dive record
One dive, 24 January 2019, 07:50-08:51 (61 minutes), maximum depth 18.3 m, water temperature 26.3°C (dive-computer average), 30% oxygen.
CV model comparison
More info
A few low-cover photos (sand, rubble, or open bottom) pull the mean down; 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.More info
DINOv3 and CoralSCOP were run on the site's photographs (see each row's n) 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.| Method | Hard coral cover (%) | Photos (n) ± SE |
|---|---|---|
| In-house DINOv3 | 34.6 | n = 118 · SE 1.6 |
| CoralSCOP edited | 45.5 | n = 117 · SE 2.3 |
| Claude (edited photos) | 29.7 | n = 118 · SE 2.1 |
The two computer-vision methods disagree by 10.9 pp (34.6–45.5%) and read 4.9–15.8 pp above Claude's blind point count (29.7%); the headline is Claude's blind point count because no transect or manual count exists here.
See a more detailed, stand-alone version of this table.
Independent surveys nearby
Within 5 km, 1 independent survey station recorded hard coral cover in 2016. The most recent nearby survey is from 2016, so these values predate recent heat stress. This site's own estimate (30%) is not compared with these surveys: none lies within 2 km.
Collected by other programs using different methods, 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.
| Agency | Site / location | Date | Hard coral cover (%) | Distance | Link |
|---|---|---|---|---|---|
| WWF-US / WWF-Indonesia | TNK11 | 2016 | 26% | 3.35 km | Amkieltiela, Abdillah T, Amkieltiela A, Andradi-Brown D, Lazuardi E. 2016. Komodo MPA. MERMAID |
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.