Reefdax.
Open ReefdaxThe community sighting map for real reefs
What is that?
Snap any reef creature — fish, coral, turtle, nudibranch. Reefdax names the species in seconds, pins your sighting to the shared live map, and adds it to your growing Dex.
What Reefdax does
See. Log. Collect.
01 — See
Recent sightings, near you
Open the live map and see what divers and snorkelers are spotting around you right now. Every pin is a real sighting logged by a real person — reef fish, turtles, rays, coral.
02 — Log
Snap it — AI names it
Take a photo underwater or upload one after the dive. Reefdax identifies the species in seconds — common name, scientific name, and a clear danger level so you know what not to touch.
03 — Collect
Your Dex grows
Every species you log joins your personal Dex — your collection of the real ocean. Spot more, find rarer creatures, collect them all.
How it works
Three steps, one dive.
- 1
Surface with a photo
Any photo works — an action-cam frame, a phone shot through the water, even a picture of your camera’s screen back on the boat.
- 2
Let the AI name it
Reefdax reads the photo and returns the species — with a confidence score, a fun fact, and how careful you should be around it.
- 3
Pin it to the map
Log where you saw it. Your sighting appears on the shared map and in your Dex — and helps the next diver know what’s out there.
A map of real sightings — nothing else.
Reefdax is young, and we keep it honest: no seeded pins, no fake activity. Every marker on the map is a sighting a real person logged. Early days mean quiet stretches of ocean — and it means your sightings genuinely shape the map.
About Reefdax
Reefdax is a free web app for identifying reef fish, corals and other marine life from a photo. It runs in the browser on any phone — no app store required — and works in English and Chinese. Built for the Maldives and for tropical reefs everywhere, it pairs AI species identification with a community sighting map and a personal collection, the Dex. Divers, snorkelers and aquarium-curious explorers use Reefdax to answer one question: what is that?