Cayman Islands · Caribbean
Bloody Bay Wall
Classic wall diving destination with broad year-round reliability.
Bloody Bay Wall off Little Cayman starts in 5m of water and plunges past 1,800m — one of the Caribbean's most dramatic walls, with healthy sponge and coral cover, queen angelfish, and reliable reef shark sightings.
Good season
Year-round; May–October is calmest. Cayman is outside the main hurricane track but not immune.
Trip duration
5–7 nights on Little Cayman.
Dive style
Wall diving from short boat rides; mild current.
Dive level
Open Water; Advanced for the deeper wall.
Reef health
What you’ll actually findThis reef is losing coral faster than it's recovering. If it's on your list, go sooner — and manage expectations on coral colour.
Coral reef health
How is this calculated?On current trend, no live coral by ~2044. Losing about 1.1% cover per year — roughly 20 years of reef left to see if nothing changes.
Heat stress right now
No abnormal heat right now. Corals stay coloured.
NOAA Coral Reef Watch · updated May 2026 · 0 °C-week heat dose
What to expect on a dive
Iconic 1000-m wall. Wall structure is intact; cover has thinned on the shallow reef crest.
Sources, methodology, and the raw numbers
Raw observed numbers
- Coral cover: 22% (survey Sep 2024, AGRRA reef survey protocol)
- Bleached: 20%
- Recent mortality: 8%
- Caribbean post-2023 — observed condition reflects the declining regional pattern.
Raw thermal numbers
- NOAA CRW alert level: No stress
- Degree Heating Weeks: 0 °C-wk
- SST anomaly: +1.5 °C
How we summarise this
Observed coral cover, bleaching, and mortality come from named in-situ surveys with a stated date and method — they describe one snapshot of one reef and do not extrapolate to neighbouring sites. Current thermal stress is satellite-derived from NOAA Coral Reef Watch at ~5 km resolution; it indicates risk, not observed coral damage. We deliberately separate observed condition, current thermal stress, and projection — and we never publish a projection without a documented model and uncertainty.
Sources
- Atlantic and Gulf Rapid Reef Assessment — AGRRA Program / Perry Institute for Marine Science
- NOAA Coral Reef Watch — U.S. National Oceanic and Atmospheric Administration
- AIMS Long-Term Monitoring Program — Australian Institute of Marine Science
- Global Coral Reef Monitoring Network — GCRMN / ICRI
- NOAA National Coral Reef Monitoring Program — NOAA Coral Reef Conservation Program
- Reef Check — Reef Check Foundation
- NOAA CoastWatch / OceanWatch — NOAA NESDIS / STAR
- Allen Coral Atlas — Arizona State University Center for Global Discovery and Conservation Science
- Great Barrier Reef Marine Park Authority — Australian Government
- International Coral Reef Initiative — ICRI Secretariat
- Reef Life Survey — Reef Life Survey Foundation
- NASA PO.DAAC — NASA Jet Propulsion Laboratory / Caltech
- Copernicus Marine Service — Mercator Ocean International for the European Union
- NASA Ocean Color (OB.DAAC) — NASA Goddard Space Flight Center / Ocean Biology Processing Group
- Argo float network — International Argo Program / UCSD
- CoralWatch — University of Queensland
- IMOS / AODN — Integrated Marine Observing System / Australian Ocean Data Network
- WRI Reefs at Risk Revisited — World Resources Institute
- Ocean Health Index — OHI partnership (Conservation International + UCSB + NCEAS)
- IPCC Special Report on the Ocean and Cryosphere (SROCC) — Intergovernmental Panel on Climate Change
- GOA-ON — Global Ocean Acidification Observing Network — GOA-ON Secretariat + IOC-UNESCO
- HAEDAT — Harmful Algae Event Database — IOC-UNESCO Intergovernmental Panel on Harmful Algal Blooms
- NCEI Marine Microplastics — NOAA National Centers for Environmental Information
Reef condition changes year to year. If you visit, consider supporting responsible-travel and conservation operators on the ground.
Pressure on this reef
Protection · fishing · what you can doProtected-area status
Strict MPAInside a strict marine protected area with active enforcement.
Fishing pressure
Moderate fishing pressureDominant pressures
- lionfish invasion
- warming
- SCTLD disease
3 Green Fins-verified operators known at this location.
What you can do
Cayman Islands Marine Parks are well-enforced; lionfish removal is encouraged. Caribbean MPAs (Cayman, Saba, Bonaire, Bonaire, Cuba JdR) are some of the world's best-managed. Pay the conservation tag fee at entry and join a lionfish cull if offered.
Protection status sourced from Protected Planet / WDPA and refined with Marine Protection Atlas. Fishing pressure proxy is Global Fishing Watch AIS data. See the methodology for what these sources can and can’t prove.
Dive sites here
3 curated
Bloody Bay Wall
One of the most celebrated wall dives in the Caribbean — a near-vertical drop from 6 m into 1800 m, draped in rope sponges, black coral, and…
Jackson's Bight
Adjacent to Bloody Bay Wall but with more swim-throughs and chimneys cut into the wall face. Resident green moray, midnight parrotfish, and …
MV Captain Keith Tibbetts
A 100 m Koni II-class Soviet frigate (ex-Cuban Navy hull #356) scuttled off Cayman Brac's north shore in September 1996 — one of only two di…
Gear
What to bringSite-specific add-ons
Some dive sites here call for extra gear. Check the individual site page for full context.
- Dive computer — Wall profile demands tight no-deco awareness. · Bloody Bay Wall
- Dive light — Swim-throughs and chimneys benefit from a beam. · Jackson's Bight
- Primary plus backup torch — The midship break and the engine rooms are now penetrable, and the corridors behind the gun turrets are dark even on the brightest day. · MV Captain Keith Tibbetts
- SMB — Boat traffic over the mooring is constant and the north-shore current can drift divers off the wreck on ascent. · MV Captain Keith Tibbetts
What divers say
“Drop in at 5m, look down, and try not to panic at the vertigo. Bloody Bay does that to first-timers.”