Taiwan - Lanyu (Orchid Island): Hen's Rock (north shore)
Part of the regional summaries: Taiwan (mainland + offshore islands) and Taiwan
More info
Southern Taiwan (NOAA CRW virtual station)A single 2008 dive at Hen's Rock where Anderson's own log records high coral cover, coral caverns, and 50 m visibility. No cover was measured; Reef Check's Hen Rock station, where the map pin now sits, recorded 57% hard coral in 2019.
2008年在雞母岩的一次潛水，Anderson 本人的紀錄記載了高珊瑚覆蓋、珊瑚洞穴和50 m 的能見度。此處沒有測量覆蓋率；地圖標記目前所在的 Reef Check 雞母岩（Hen Rock）測站於2019年記錄到57%的石珊瑚。
本摘要由 AI 翻譯；以英文版本為準。
Ten independent survey stations shown with the program’s logo — click one to see how far it is from this site.
Two other CRD dive sites with their own pages within 5 km shown in orange — click a marker to open its page.
Site description
Coral cover
- The log records high coral cover, nice coral caverns, and 50 m visibility, but that is a first-hand impression, not a measurement, and no cover was recorded.
Stressors
Anderson's dive log for this dive (13 July 2008) describes high coral cover, coral caverns, and 50 m visibility and records no bleaching, disease, crown-of-thorns starfish, or other stressor.
Comparisons with other data
The pin sits on Reef Check's Hen Rock station; its latest surveys, on 30 June 2019, recorded 57% hard coral (mean of 2 surveys, 5 m and 10 m; Reef Check data, a separate survey, not a survey of this dive). Across Lanyu, Reef Check station-year means ranged 6.3-67% hard coral cover between 1998 and 2019 (source: Reef Check).
Dive record
One dive, 13 July 2008, 46 minutes to 17.7 m, on Lanyu's north shore.
No underwater photographs from this site are on file.
Independent surveys nearby
Within 5 km, 10 independent survey stations recorded hard coral cover in 32 surveys between 2010 and 2019. Of the 3 stations surveyed in more than one year, 3 declined (by 2.0–8.0 points) between their first and latest surveys. The longest record, Hen Rock (Reef Check, 0.00 km away), went from 62% in 2015 (mean of 2 surveys) to 57% in 2019 (mean of 2 surveys). The most recent nearby survey is from 2019, so these values predate recent heat stress.
Collected by other programs using different methods (Reef Check uses point-intercept transects), 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 |
|---|---|---|---|---|
| Reef Check | Lion Couple Rock | 2010 | 43%, mean of 2 surveys (3 m and 11 m) | 1.24 km |
| Reef Check | Virgin Rock | 2010 | 48%, mean of 2 surveys (3 m and 10 m) | 3.01 km |
| Reef Check | Hen Rock | 2015–2019 | 50–63% (range of yearly means; 8 surveys) | 0.00 km |
| Reef Check | Langdao Harbor | 2015 | 46%, mean of 2 surveys (5 m and 10 m) | 2.45 km |
| Reef Check | Maiden Rock | 2015 | 57%, mean of 2 surveys (5 m and 10 m) | 3.67 km |
| Reef Check | Beauty Rock | 2016 | 67%, mean of 2 surveys (5 m and 10 m) | 3.72 km |
| Reef Check | Land Temple/Earth God Temple | 2016 | 20%, mean of 2 surveys (5 m and 10 m) | 4.89 km |
| Reef Check | Nipple Mountain | 2017 | 44%, mean of 2 surveys (5 m and 10 m) | 2.71 km |
| Reef Check | Beauty Rock | 2017–2019 | 48–50% (range of yearly means; 6 surveys) | 4.21 km |
| Reef Check | Lion Couple Rock South | 2018–2019 | 43–51% (range of yearly means; 4 surveys) | 1.29 km |
Data & links
Data on this page are from Coral Reef Diagnostics (the dive record) and the organizations named in the data sources above; Coral Reef Diagnostics has no coral cover estimate of its own at this site.
© Coral Reef Diagnostics.