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Croatia · about 12 km from Komiža (Vis)

Medvidina špilja (Biševo)

  • Max depth30 m
  • CertificationOpen water / no overhead
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Diving and fills

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Fills nearby

  • Fill stationDiving Center B-24 (Komiža, Vis)~12 km, by ferry or boatAir, nitrox, trimix, O₂; booster (Dräger) to 300 barRoute ↗
  • Fill stationDiving Center Pongo (Primošten)~71 km, by ferry or boatAir, nitrox (30–36%), oxygen and helium (ask); stage cylinders and 3-litre rebreather cylindersRoute ↗
All fill stations and places to stay ↓

The dive

A sea cave of 160 m: a spacious main hall and a low, winding passage that ends after ~70 m at a small beach. Visibility is 10–30 m, with no current.

Profile and sections

A sea cave of 160 m: a spacious main hall and a low, winding passage that ends after ~70 m at a small beach. Visibility is 10–30 m, with no current.

The cave is named after the monk seals that once lived there, and has been protected since 1967.

Depth and profile
Avg -5 m, max -30 m (wannadive); cave 160 m long
Configuration
All configurations
DPV: Not DPV-suitable (estimate)
Short cave; no point.
Who can dive where
  • CaveAt least Open water / no overhead
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveGoes down to 30 m (trimix or deco may be needed) · doesn't decide who may dive
Depends on water level or swell

This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.

How to get there

By boat (>30 min, e.g. from Komiža). Entrance: a narrow, almost vertical cleft ~30 m high in a gorge on the south-east side of Biševo.

Plan your route ↗

Around Medvidina špilja (Biševo)

Fills2 fill stations · nearest 12 km

  • Diving Center B-24 (Komiža, Vis)

    ~12 km, by ferry or boat

    Obala Pape Aleksandra III 8, 21485 Komiža, Vis

    Air, nitrox, trimix, O₂; booster (Dräger) to 300 bar

    Ask

    Full rebreather support: absorbent and 3 l cylinders for rent; rental CCR ISC Megalodon and Pathfinder (€80); O₂ stages 7 or 11.1 l. Tech wreck dives in the -40 to -120 m range. Closest to Medvidina špilja (Biševo).

    Website ↗Navigate ↗

  • Diving Center Pongo (Primošten)

    ~71 km, by ferry or boat

    Raduča ul. 11, 22202 Primošten

    Air, nitrox (30–36%), oxygen and helium (ask); stage cylinders and 3-litre rebreather cylinders

    Not stated — ask

    Dive centre with two Bauer compressors and a nitrox and trimix blender; TDI tech courses up to normoxic trimix and gas blender.

    Website ↗Navigate ↗
Where to sleepAround Komiža (Vis) on Booking.com ↗

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Caves nearby2 within 52 km

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Garašić EGU 2017, Subterranea Croatica 2019, HGSS 2014, Wikipedia, stranypotapecske.cz, wannadive.net, dive centres, Kornati NP, Croatian Ministry of the Sea, KBC Rijeka, OXY, news; Sept 2026); for the Kvarner the pages of Dive Center Krk, JU Priroda and Wikipedia (Oct 2026). Pins come from Wikipedia, stranypotapecske.cz and wannadive.net; five springs have a pin from OpenStreetMap, one site has none (yet). ~ = estimate. Rules change — check locally.