Dive sites, seasons and marine life — researched, mapped, planned.
Menu
Destinations Dive Sites Marine Life Wrecks News
Plan a trip Trip planner When to dive Cost calculator Comparisons Marine-life calendar Water temperature Liveaboards Operators & resorts Marine parks Hyperbaric chambers World map
Regions Australia, New Zealand & East AsiaCaribbean & Western AtlanticEurope, Atlantic & MediterraneanIndian Ocean & East AfricaPacific Islands & MicronesiaRed Sea & Middle EastSoutheast Asia & Coral TriangleThe Americas & Eastern Pacific Countries
Learn & Tools All guides Certifications Gear guides Videos Ask the Data AI Agents API
About About us Methodology Disclaimer Contact
Your view
★ Saved

Your starred destinations, sites and species — stored in this browser.

API GATEWAY

Free read-only JSON access to the atlas's cached data.

Dark mode

🧭 Guided View
New to diving — depths, currents, certification levels? We explain every term as you browse, in plain English. Same data, with the help built in.

⚡ Expert View
You already know the difference between a wall and a drift. Just the data — clean, fast and compact. This is the default view.

Interface language
Laje Dois Irmaos — illustrative image

Laje Dois Irmaos

Reef 8–25 m Intermediate Fernando de Noronha, Brazil
AI-generated illustration
Documented
Depth
8–25 m / 26–82 ft
Typical depth
16 m / 52 ft
Visibility
20–40 m / 66–131 ft
Water
26–28 °C / 79–82 °F
Current
Moderate
Access
Boat
Best months
Aug–Nov
Recommended cert
Open Water

Depth is the range from the top of the site to its usual maximum; "recommended cert" is the mainstream-agency level operators usually ask for, not a legal rule. Currents and visibility change daily — treat everything here as planning ranges.

Off the twin humps of Morro Dois Irmaos - the postcard silhouette on the island's inner coast - a submerged slab and boulder field gathers Noronha's shark life into one reliable circuit. Lemon sharks, the archipelago's signature, cruise the shallows with their escort of jacks; Caribbean reef sharks hold deeper along the slab's edge; and the rubble in between belongs to morays, octopus, and drifts of grunts and goatfish. Spinner dolphins transit the area on their daily commute between the dolphin bay and open water, and hearing their whistles mid-dive is common even when the pod stays out of view. Calm-season conditions make it a forgiving dive with front-row wildlife.

The moment you come for: Lemon sharks in the shallows, reef sharks on the slab edge, dolphin whistles through the water

Topography: Rock slab and boulder reef near the Two Brothers islets

Know before you splash

Hazards: Current off the points; swell exposure December-March.

Conservation: The neighboring dolphin bay is closed to entry; boats keep mandated distance from resting pods.

Who you'll meet

For photographers

Wide angle: ★★★★★ · Macro: ★★☆☆☆ — editors' 1–5 rating of what this site gives each style of shooting

Australia, New Zealand & East Asia

Cairns & the Ribbon ReefsNingaloo ReefCoral Sea & Osprey ReefOkinawa & the Kerama IslandsPoor Knights IslandsTownsville & the YongalaGreen IslandIzu Peninsula

Caribbean & Western Atlantic

BonaireCozumelRiviera Maya & the CenotesBelize Barrier ReefGrand CaymanIsla Mujeres & CancúnRoatánTiger Beach & Grand Bahama

Europe, Atlantic & Mediterranean

Malta & GozoSilfra & IcelandThe AzoresCanary IslandsLarnaca & the ZenobiaScapa FlowArctic NorwayMadeira

Indian Ocean & East Africa

North & South Malé AtollsAri AtollBaa Atoll & Hanifaru BayAliwal Shoal & UmkomaasMafia IslandMauritiusSeychellesSodwana Bay

Pacific Islands & Micronesia

PalauChuuk (Truk) LagoonFakaravaKona, HawaiʻiRangiroaTaveuni & Rainbow ReefBeqa Lagoon & Pacific HarbourEspiritu Santo

Red Sea & Middle East

Sharm El Sheikh & Ras MohammedBrothers, Daedalus & St John'sDahabHurghada & El GounaMarsa Alam & the Deep SouthAqabaDaymaniyat IslandsMusandam Peninsula

Southeast Asia & Coral Triangle

Bali & Nusa PenidaKomodoRaja AmpatSipadan & MabulAnilaoCoronKoh TaoLembeh Strait

The Americas & Eastern Pacific

Galápagos IslandsCocos IslandFlorida KeysSea of Cortez & Cabo PulmoSocorro & the RevillagigedosBritish ColumbiaCalifornia Channel IslandsCosta Rica Pacific Coast