Big Tunnels
Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
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About this site
Big Tunnels lies along Grand Cayman's coast in the Cayman Islands, an area known for its fringing wall and reef diving, with sites in this stretch of the island typically reached by boat out to the surrounding reef formations. As the name suggests, this is a cave dive with an overhead environment, reaching a maximum depth of around 30 metres and rated intermediate. Visibility is generally great, and divers have reported scorpionfish tucked into the cave terrain.
AI overviewMarine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Common LionfishPterois volitansReported here · unconfirmed
Greater Star CoralMontastraea cavernosaReported here · unconfirmed
Mustard Hill CoralPorites astreoidesReported here · unconfirmed
Atlantic Blue TangAcanthurus coeruleusReported here · unconfirmed
Longspine SquirrelfishHolocentrus rufusReported here · unconfirmed
Lobed Star CoralOrbicella annularisReported here · unconfirmed
French AngelfishPomacanthus paruReported here · unconfirmed
ScorpionfishScorpionfishReported here · unconfirmed
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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