Jackson Blue Spring

Jackson Blue is one of the cave systems feeding the Merritt Mill Pond near Marianna, FL. It has a beautiful cavern zone, and the cave system is is beautiful, with clean white limestone.

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What you'll see (11)

Florida Apple SnailPomacea paludosaseen 7× near here

Pond SliderTrachemys scriptaseen 3× near here

Eastern Musk TurtleSternotherus odoratusseen 2× near here

White Tubercled CrayfishProcambarus spiculiferseen 2× near here

Common Snapping TurtleChelydra serpentinaseen 1× near here

River CooterPseudemys concinnaseen 1× near here

Barbour's Map TurtleGraptemys barbouriseen 1× near here

BluegillLepomis macrochirusseen 1× near here

Grass CarpCtenopharyngodon idellaseen 1× near here

Stygobromus floridanusseen 1× near here

Coastal Plain CooterPseudemys floridanaseen 1× near here

Planning a trip

8–12 days

worth going for

Long haul, usually two flights.

16,317km from Singapore — about 24h each way, so two of those days are travel. the only logged site in the area.

When people dive it

Busiest Mar, Aug.

From 413 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

70% 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

~39h 36m

door to water, each way · 4 legs

FlightMiami (MIA)~25h 6mFlight time plus the airports at both ends. A connection adds to it.Find flights →
Transferthe jetty~12hRoad 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 boatJackson Blue Spring~30 minThen the dive boat out from the island.

📍 Jackson Blue Spring on Google Maps 🧭 Route from Miami

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

Type: yes
Country: United States
Marks: 30°47.427'N 85°8.406'W
Position: 30.7905, -85.1401

Site website →

Where it is

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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.