Grotte Mystérieuse

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What you'll see (20)

Red ScorpionfishScorpaena scrofaseen 418× near here

Leopard Sea SlugPeltodoris atromaculataseen 399× near here

Mediterranean MorayMuraena helenaseen 387× near here

Tricolored FelimareFelimare tricolorseen 339× near here

Violescent Sea-whipParamuricea clavataseen 338× near here

Pink CoryphellaEdmundsella pedataseen 323× near here

Yellow Cluster AnemoneParazoanthus axinellaeseen 322× near here

Common Two-banded SeabreamDiplodus vulgarisseen 311× near here

Black-faced BlennyTripterygion delaisiseen 310× near here

Cratena SlugCratena peregrinaseen 300× near here

Common OctopusOctopus vulgarisseen 282× near here

Yellow GorgonianEunicella cavoliniseen 280× near here

Mediterranean Rainbow WrasseCoris julisseen 270× near here

Brown WrasseLabrus merulaseen 267× near here

Striped Red MulletMullus surmuletusseen 249× near here

Mediterranean Red Sea StarEchinaster sepositusseen 247× near here

Salema PorgySarpa salpaseen 234× near here

Small Red ScorpionfishScorpaena notataseen 232× near here

Paraflabellina ischitanaseen 223× near here

Mediterranean Sea FingerAlcyonium acauleseen 211× near here

Planning a trip

8–14 days

worth going for

Long haul, usually two flights.

10,588km from Singapore — about 24h each way, so two of those days are travel. 50 dive sites within 25km, enough for several days of diving.

When people dive it

Busiest Apr, Aug.

From 46,895 logged sightings — when divers are in the water, which is not quite the same as when visibility is best.

Dive Crew is a dive group from Singapore. Members plan trips here, log their dives, and share their photos of each site.

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Moon and tides

Waning gibbous

71% lit · day 20 of the lunar month

Neap tides

Neap tides — the smallest range of the month, so the weakest currents. Easy conditions and usually the clearest water, though a drift site may barely drift.

New 10 Oct Full 26 Oct

Phase computed here, not fetched. This is the spring/neap cycle, which sets how hard the water moves — not a tide table: no free source publishes high and low water for Southeast Asian reefs, and the range peaks a day or two after the moon does, by an amount that varies with the coast. For times on the day, ask the operator.

Getting there

~20h 30m

door to water, each way · 4 legs

FlightNice (NCE)~16h 24mFlight time plus the airports at both ends. A connection adds to it.Find flights →
Transferthe jetty~1h 36mRoad transfer to the coast, usually arranged by the resort or liveaboard.Directions →
Ferrythe crossing~2hAt this distance the last stretch is a scheduled crossing rather than a dive boat, so book it before the flight — a missed sailing usually costs a day. Which crossing it is has been worked out from the distance and not from a timetable; ask the operator.
Dive boatGrotte Mystérieuse~30 minThen the dive boat out from the island.

📍 Grotte Mystérieuse on Google Maps 🧭 Route from Nice

Times marked ~ are estimated from straight-line distance and will be roughly right at best. The road legs are the ones Google Maps answers properly; it will not plan the ferry or the dive boat at all. A dive site's coordinates put a pin in open water, so the map link drops you on the site, not on a jetty.

Details

Max depth: 15 m
Island: Riou
Country: France
Marks: 43°12.046'N 5°21.956'E
Position: 43.2008, 5.3659
Note: Moved 600 m off the OSM position, into the water

Where it is

Loading the map…

Nearby

Sightings and photographs from iNaturalist contributors, research-grade records within 6km, under Creative Commons licences. Counts are what divers and snorkellers have bothered to log — a common fish with few records is common all the same.