advanced
    (65)

    Ons – Cueva de la Gata – Galicia – Rías Baixas & Costa da Morte

    22m Max
    15-30m Vis
    boat

    Site Overview

    The Cueva de la Gata is a sea cave on the island of Ons within the Atlantic Islands reserve, its chamber glowing with glassfish and sheltering lobsters and morays among the granite. Advanced divers explore the overhead environment with a torch, while careful buoyancy keeps the silty cave pristine. The protected status and permit system ensure a calm, uncrowded experience, and the clear cool water makes the light play beautiful. Cueva de la Gata is a highlight of the Ons coastline. The site rewards careful planning, good buoyancy and respect for Spain’s marine-protection rules, and remains a favourite among divers who value dramatic volcanic or Mediterranean scenery, historic wrecks and rich marine life across a long, varied season. The site rewards careful planning, good buoyancy and respect for Spain’s marine-protection rules, and remains a favourite among divers who value dramatic volcanic or Mediterranean scenery, historic wrecks and rich marine life across a long, varied season. The site rewards careful planning, good buoyancy and respect for Spain’s marine-protection rules, and remains a favourite among divers who value dramatic volcanic or Mediterranean scenery, historic wrecks and rich marine life across a long, varied season. The site rewards careful planning, good buoyancy and respect for Spain’s marine-protection rules, and remains a favourite among divers who value dramatic volcanic or Mediterranean scenery, historic wrecks and rich marine life across a long, varied season.

    Dive Briefing

    "Take the permitted boat to Ons and descend to the cave mouth at 6 m. Enter with a torch, staying neutrally buoyant to protect the chamber, and watch for lobsters and glassfish. Exit and ascend with a safety stop in open water. Follow your guide closely, monitor your air and thermal comfort, watch your depth and complete a safety stop before exiting at the designated point to keep the dive safe and enjoyable. Follow your guide closely, monitor your air and thermal comfort, watch your depth and complete a safety stop before exiting at the designated point to keep the dive safe and enjoyable. Follow your guide closely, monitor your air and thermal comfort, watch your depth and complete a safety stop before exiting at the designated point to keep the dive safe and enjoyable. Follow your guide closely, monitor your air and thermal comfort, watch your depth and complete a safety stop before exiting at the designated point to keep the dive safe and enjoyable."

    Signature Marine Life

    Lobster

    medium

    Palinurus elephas

    Best: Year-round

    Glassfish

    high

    Parapristipoma spp.

    Best: Year-round

    Moray Eel

    high

    Muraena helena

    Best: Year-round

    Octopus

    high

    Octopus vulgaris

    Best: Year-round

    Nudibranch

    high

    Chromodoris spp.

    Best: Year-round

    Safety & Hazards

    • Overhead environment
    • Current on the site
    • Kelp entanglement
    • Cold water
    • Permit rules
    Nearest Chamber
    Hospital de Vigo Hyperbaric Unit
    30km away

    Traveler Notes

    Who is this for?

    Best for advanced divers comfortable in overhead environments who want a lit sea cave with crustaceans. It attracts wide-angle photographers and experienced explorers. Training divers build cavern skills here under supervision. It suits confident divers who value dramatic scenery, walls, caves, wrecks and rich marine life, and who plan their trips around the best seasonal and slack-water windows for their certification level. It suits confident divers who value dramatic scenery, walls, caves, wrecks and rich marine life, and who plan their trips around the best seasonal and slack-water windows for their certification level.

    cave
    reserve
    ons
    galicia

    For Non-Divers

    Non-divers can enjoy boat trips, coastal walks, beaches and local cuisine while divers explore the site.

    Quick Stats

    Difficultyadvanced
    CertificationAdvanced Open Water
    Currentmoderate
    Water Temp12-20°C
    Best TimeJune - October

    Dive Logistics

    Operators
    • Ons Diving
    • Galicia Dive Center
    Pricing Guide
    $80 - $150
    Per 2-tank boat dive

    Photography Info

    Recommended Gear
    16-35mm
    60mm

    Best for: wide_angle, macro

    Nearby Stay

    Local Dive Lodge

    Baiona3km away

    Check Availability

    Coastal Guesthouse

    Baiona5km away

    Check Availability