Banded coral shrimp (Stenopus hispidus)
A dive briefing · British Virgin Islands

Wreck Alley (Cooper Island)

Dive site in the British Virgin Islands. Here's what has been recorded at this site month by month, how the region’s reefs have weathered ocean heat, and how to prepare.

British Virgin Islandswreck
Near this sitegeotagged about 1.4 km from the site coordinates Banded coral shrimp (Stenopus hispidus) · Pauline Walsh Jacobson · CC BY 4.0 · iNaturalist
Branching vase sponge (Callyspongia aculeata)
Chapter I · Arrival

Wreck Alley (Cooper Island): dive site in the British Virgin Islands.

~18.386° N~64.512° W · Wikidata
420open records · GBIF
44species recorded
Near this sitegeotagged about 1.4 km from the site coordinates Branching vase sponge (Callyspongia aculeata) · Pauline Walsh Jacobson · CC BY 4.0 · iNaturalist
II

Entry

Branching vase sponge (Callyspongia aculeata)

Shore and boat entries vary by site. We list only rules we can cite from official sources; entry points, depths and currents will be added once we can verify them.

Approximate positionThese coordinates are the position of Cooper Island; the wrecks lie off it. Use them for orientation only.
To verifyDepth range, entry points and current notes. We publish them only with a citation. The coordinates mark the site in general, not a mooring or entry point.
Local rules (cited)

Near this sitegeotagged about 1.4 km from the site coordinates Branching vase sponge (Callyspongia aculeata) · Pauline Walsh Jacobson · CC BY 4.0 · iNaturalist

Banded coral shrimp (Stenopus hispidus)
Open media · Near this sitegeotagged about 1.4 km from the site coordinates Banded coral shrimp (Stenopus hispidus) · Pauline Walsh Jacobson · CC BY 4.0 · iNaturalist

The surface noise falls away.

Reds go first. The world turns blue-green.

Then Wreck Alley (Cooper Island) rises to meet you.

Banded coral shrimp (Stenopus hispidus)
IV

What lives here, by month

Pick a month. These are the species most often recorded within about a kilometre in that month, from open survey records.

Oct
October · 33 qualifying records
Life calendar · records per month for this site's most-recorded species (blank means not in that month's top list)
SpeciesJanFebMarAprMayJunJulAugSepOctNovDec
Blackbar Soldierfish
Trumpetfish
French angelfish
Common sea fan
Longfin Damselfish
Deep-water sea fan
Reef butterflyfish
Butter Hamlet
Yellow Goatfish
Bicolor Damselfish
Banded Coral Shrimp
Hawksbill

Most-recorded species, all months

  1. Blackbar Soldierfish (3)
  2. Trumpetfish (2)
  3. French angelfish (2)
  4. Longfin Damselfish (2)
  5. Common sea fan (2)
  6. Orangeclaw hermit (1)
  7. White Speckled Hermit (1)
  8. Nimble spray crab (1)
  9. Elkhorn coral crab (1)
  10. Deep-water sea fan (1)
  11. West Indian topsnail (1)
  12. Live sharksucker (1)
  13. Sharknose Goby (1)
  14. Royal Gramma (1)
  15. Caesar grunt (1)
  16. French Grunt (1)
  17. Bluestriped Grunt (1)
  18. Puddingwife wrasse (1)
  19. Bluehead Wrasse (1)
  20. Schoolmaster Snapper (1)

GBIF.org (2026-10-15), occurrence records within ~1 km, licensed CC0 or CC BY 4.0 only. Birds and land animals are excluded. Counts reflect survey effort, not abundance. 420 qualifying records. See them on GBIF. Common names: Wikidata (CC0) / GBIF. Species photos: Wikimedia Commons, credited with each species.

V

Forty-one summers of heat

Each stripe is one year since 1985, colored by its peak heat stress across NOAA's “Virgin Islands” region. These are NOAA Coral Reef Watch satellite figures for the whole region, not for this one site.

19852026
Reef health report · Virgin Islands

Heat stress, measured from orbit.

Degree Heating Weeks · 2026-10-139.5°C-weeks · NOAA status: Alert Level 2

NOAA CRW virtual station “Virgin Islands”. NOAA's alert thresholds are 4 °C-weeks (Alert Level 1) and 8 °C-weeks (Alert Level 2). Station page · Method. Credit: NOAA Coral Reef Watch.

Peak per year · dashed lines at 4, 8 and 16 °C-weeks
The past twelve months
VI

Conditions

Average sea temperature through the year. Check the live readings before you go.

Average sea surface temperature by month: NOAA CRW “Virgin Islands” station climatology (monthly means).

Buoy readings are measurements; forecasts are models. Use them for planning only, and assess conditions on site. Depth and visibility data aren't listed until we can cite a source.

VII

Plan & prepare

  1. Read the official marine forecast the night before.Offshore, wind and sea state decide the day.
  2. Check the cited local rules above and pay any park fee before you dive.[Placeholder: verified operator list to come]
  3. Study this month's species above.You'll recognise more when you know the names.
  4. Hands off, fins up, buoyancy dialled. Log what you see.Your sightings can become tomorrow's open data.

Credits

Coordinates
Wikidata Q3133275 (CC0) · position of Cooper Island; the wrecks lie off it. Wikidata (CC0) items for the RMS Rhone and HMS Astraea wrecks and for named islands, rocks and points; most mark the nearby island or point, so treat them as approximate.
Species records
GBIF.org, CC0 & CC BY 4.0 records. By license: CC_BY_4_0: 418, CC0_1_0: 2
Dataset
EOD – eBird Observation Dataset · doi:10.15468/aomfnb (364 records) · GBIF
Dataset
iNaturalist Research-grade Observations · doi:10.15468/ab3s5x (53 records) · GBIF
Dataset
Vertebrate Zoology Division - Herpetology, Yale Peabody Museum · doi:10.15468/ypdvp9 (2 records) · GBIF
Dataset
University of Michigan Museum of Zoology, Division of Reptiles & Amphibians · doi:10.15468/g3bard (1 records) · GBIF
Query
https://api.gbif.org/v1/occurrence/search?decimalLatitude=18.375899999999998,18.3959&decimalLongitude=-64.5218,-64.50179999999999&license=CC0_1_0&license=CC_BY_4_0&taxonKey=44&taxonKey=206&taxonKey=229&taxonKey=136&taxonKey=225&occurrenceStatus=PRESENT&limit=0
Heat stress & SST
NOAA Coral Reef Watch, 5 km Regional Virtual Station “Virgin Islands”
Hero photo
Near this sitegeotagged about 1.4 km from the site coordinates Banded coral shrimp (Stenopus hispidus) · Pauline Walsh Jacobson · CC BY 4.0 · iNaturalist
Arrival photo
Near this sitegeotagged about 1.4 km from the site coordinates Branching vase sponge (Callyspongia aculeata) · Pauline Walsh Jacobson · CC BY 4.0 · iNaturalist
Gallery
7 photos, credited under each image
Species photos
Wikimedia Commons, credited with each species. Full list: Data & sources