Ilha de Ancora - Arraial do Cabo
Mamaru, named for the white-tip reef sharks you'll absolutely meet here, is one of those gentle slopes that just keeps giving. We start shallow, often spotting green and hawksbill turtles almost immediately, before drifting down towards a sandy spit. That's where the show really begins: dozens of white-tip reef sharks, sometimes even a few lemon sharks, cruise or settle on the sand at around 20 metres. The visibility here is usually excellent, around 22 metres, which means you get clear views of the sharks as they glide past. It's not a site for dramatic drop-offs or intricate coral gardens – though you'll see some nice Pavona and Staghorn corals – but the sheer density of sharks makes it a truly special dive. Our pick for a relaxed shark encounter, perfect for photographers wanting to capture those classic shark-on-sand shots without needing extreme depths. Just settle in, let the current carry you, and watch the white-tips go about their day.
- Location
- Arraial do Cabo, Brazil, South America
- Coordinates
- -22.769300, -41.795100
Marine Protected Area: Parque Natural Municipal Dos Corais De Armação Dos Búzios
Best Time to Dive in Arraial do Cabo
The warmest water temperatures in Arraial do Cabo occur in January, averaging 26.6°C. The coolest conditions are in August at 21.6°C.
Monthly Water Temperatures
- January: 26.6°C
- February: 26.4°C
- March: 26.5°C
- April: 25.0°C
- May: 24.0°C
- June: 22.9°C
- July: 21.9°C
- August: 21.6°C
- September: 22.2°C
- October: 23.0°C
- November: 23.4°C
- December: 24.8°C
Nearby Dive Sites in Arraial do Cabo
- ALINA P - 19m (wreck)
- AQUIDABAN - 16m (wreck)
- Baixo do Carapebus (reef)
- Baixo do Carapebus (reef)
- Baixo do Marobá (reef)
- Baixo do Marobá (reef)
- Baixo do Una (reef)
- Baixo do Una - 10-20m (reef)
- BATEAU MOUCHE IV - 17m (wreck)
- Bunda do Elefante - 10-25m (reef)
- Buraco do Mero - 15-30m (cave)
- California
- Canal da Ilha Menina (wall)
- CORI BROTHERS - 7m (wreck)
- Coroa Grande
Nearest Dive Centres to Ilha de Ancora
Marine Life in Arraial do Cabo
Home to 62 recorded species including 44 reef fish, 3 other, 3 crabs & lobsters, 3 sea urchins, 2 whales & dolphins, 2 seagrass & algae.
Notable Species
- Estuarine Dolphin (Sotalia guianensis) - Whales & Dolphins
- Sergeant-major (Abudefduf saxatilis) - Reef Fish
- Demoiselle (Stegastes fuscus) - Reef Fish
- Porkfish (Anisotremus virginicus) - Reef Fish
- Caesar (Haemulon aurolineatum) - Reef Fish
- South-American Silver Porgy (Diplodus argenteus) - Reef Fish
- Ringneck Blenny (Parablennius pilicornis) - Reef Fish
- Black-ear wrasse (Halichoeres poeyi) - Reef Fish
- Dusky grouper (Epinephelus marginatus) - Reef Fish
- Savigny's Brittle Star (Ophiactis savignyi)
- Butterbun (Chaetodon striatus) - Reef Fish
- Sea lettuce (Ulva lactuca) - Seagrass & Algae
- Seaweed Blenny (Parablennius marmoreus) - Reef Fish
- Grunt (Haemulon steindachneri) - Reef Fish
- Mangrove Tree Crab (Aratus pisonii) - Crabs & Lobsters
- Comb Grouper (Mycteroperca acutirostris) - Reef Fish
- Cook (Holocentrus adscensionis) - Reef Fish
- Cluck (Pareques acuminatus) - Reef Fish
- Spotted Goatfish (Pseudupeneus maculatus) - Reef Fish
- thorny worm (Glycera americana) - Worms
Recommended Packing List for Ilha de Ancora
Based on average water temperature of 24.0°C, currents 7 cm/s.
- Shorty or Rashguard - warm 24°C water needs minimal exposure protection
- Mask - essential for every dive
- Fins
- BCD - buoyancy compensator
- Regulator - your most safety-critical piece of gear
- Dive Computer - tracks depth, time, and NDL
- Surface Marker Buoy (SMB) - essential for boat pickups
- Dive Torch - useful for crevices and colour at depth
- Underwater Camera - capture your diving memories