Dive Site: Tanikely Canyon

About Tanikely Canyon

Nosy Tanikely, often called "the island of small land," is an uninhabited islet nestled in the bay of Nosy Be, Madagascar. It's globally recognized for its exceptional marine biodiversity, earning its reputation as a natural aquarium. Established as a marine reserve in 2010, a 700-meter radius around its historic lighthouse protects its vibrant ecosystems from fishing, ensuring a pristine environment for divers and snorkelers alike. The underwater topography of Tanikely features diverse dive sites, including gentle slopes, small drop-offs, and coral spurs. Depths typically range from shallow snorkeling areas to around 24 meters, making it suitable for various experience levels. The warm tropical waters, influenced by the alluvial deposits from the Sambirano River, contribute to a rich nutrient environment that supports extensive coral reefs and a spectacular array of marine species. Divers here can anticipate an immersive experience surrounded by healthy hard and soft corals, frequented by large schools of fish, rays, and various shark species. The area is particularly famous for frequent turtle sightings and seasonal visits from larger pelagics like whale sharks and humpback whales. Topside, the island offers picturesque beaches, a lush forest, and panoramic views from its lighthouse, making it a comprehensive destination for nature lovers. Visitors usually access Tanikely on day trips from Nosy Be or nearby islands, with basic infrastructure provided for comfort, including a reception, picnic area, interpretation center, and toilets. Its accessibility and protected status make it a key highlight for any diving itinerary in Madagascar.

Dive site facts: Tanikely Canyon

Depth

0–24 m

Typical dive

15–20 m, 50–60 min

Current

Variable, mild to strong

Visibility

10–30+ m

Water temperature

25–28°C

Entry

Boat / drift

Level

All levels (beginner-friendly to experienced)

Dive type

Reef, drift, macro, pelagic encounters

Region / port

Nosy Be Archipelago

Coordinates

-13.49, 48.225

Conditions & Currents

Currents at Nosy Tanikely are generally variable, ranging from weak to strong depending on the specific dive site and tidal conditions. Sites like Tanikely Nord and Sud are often drift dives, where the current dictates the pace, allowing divers to effortlessly glide along the reef. While some areas are sheltered and suitable for beginners, other sites can present more challenging conditions, attracting large pelagic species. Divers should be prepared for varying current strengths and ensure good buoyancy control to avoid contact with the vibrant coral structures. Visibility can be excellent but may occasionally decrease due to plankton blooms, which, conversely, attract larger marine life. Surface intervals are typically an hour, and dive times are generally capped at 60 minutes.

Marine life & sighting chances

Green Sea Turtle

common

Hawksbill Sea Turtle

common

Leopard Shark

occasional

White-tip Reef Shark

occasional

Whale Shark

September-January · occasional

Manta Ray

April-July, September-November · occasional

Blue-spotted Stingray

common

Crocodile Fish

common

Frogfish

occasional

Nudibranch

common

Moray Eel

common

Humpback Whale

July-December · rare

Giant Trevally

common

Spotted Gaterin

common

Dive profile & how the dive runs

Dives at Nosy Tanikely typically begin with a boat entry, often as drift dives, allowing the current to guide you along the reef. The island offers three distinct dive areas: North, South, and East. On the North side, expect a drift along beautiful corals between 0 and 15 meters, then descending to 15 to 24 meters, past gorgonians. The South features a small drop-off with stunning coral architecture from 2 to 6 meters, extending to small coral spurs in the sand at 16 to 20 meters. The East dive usually explores depths up to 20 meters, with the 13-15 meter zone being particularly rich, often ending in shallower waters from 0 to 6 meters. Safety stops are conducted in the tranquil, shallow areas, often surrounded by diverse fish life.

Underwater photography

Nosy Tanikely is a highly rewarding location for underwater photographers, particularly given its clear waters and abundant natural light in shallower areas. For wide-angle shots, a fisheye or wide-angle lens will capture the expansive coral formations and schooling fish, especially the dense schools of snappers that can obscure the reef. When encountering larger pelagics like whale sharks or manta rays, a wide-angle setup is essential. For macro enthusiasts, the multitude of nudibranchs, ghost fish, and leaf fish on the shallow reefs provides excellent subjects; a macro lens will highlight their intricate details. Good buoyancy control is crucial here to avoid damaging the delicate corals. Consider using natural light for vibrant colors in shallow dives, but bring strobes to enhance contrast and color fidelity in deeper sections or for capturing fast-moving subjects. Due to the variable currents, ensuring all camera equipment is securely stowed is important.

Combine with nearby dive sites

• Nosy Komba Reef

  A volcanic island known for its lemurs and healthy reefs, often combined with Tanikely trips.

• Nosy Mitsio Pinnacles

  Further afield, offering deeper dives and pelagic encounters.

• Nosy Iranja Drop-off

  Known for dolphin encounters and deeper reef structures.

• The Wall (Nosy Be)

  A site with steep walls covered in colorful corals and larger marine life.

Getting there & logistics

Access to Nosy Tanikely typically involves flying into Ivato International Airport (TNR) in Antananarivo, followed by a domestic flight to Fascène Airport (NOS) in Nosy Be. Alternatively, some airlines offer direct international flights to Nosy Be. From Nosy Be, Tanikely is a short 20-minute speedboat ride. Most diving trips to Tanikely are day excursions, departing from Nosy Be, Nosy Komba, or Ankify. Liveaboards and land-based operations from Nosy Be often include Tanikely in their itineraries, providing accommodation in charming boutique hotels or lodges. Park entrance fees are mandatory as it is a protected marine national park. Typical dive packages include two guided dives per day, with equipment provided. Ensure your itinerary combines this site with other regional highlights for a comprehensive diving experience in the Nosy Be archipelago.

Safety & environment

Diving at Nosy Tanikely, while generally accessible, requires adherence to standard dive safety protocols. The nearest recompression chamber is not readily available, making prudent dive planning, strict adherence to no-decompression limits, and appropriate surface intervals paramount. Divers should carry comprehensive dive insurance that covers emergency evacuation and medical treatment. Site-specific hazards include potentially strong currents, especially during drift dives; maintaining good buddy contact and carrying an SMB is advisable. Divers must respect the marine reserve's rules, which prohibit touching marine life, collecting corals or shells, and disturbing the environment. Buoyancy control is essential to avoid accidental contact with delicate coral ecosystems. Always follow the instructions of your certified dive guide, who possesses local knowledge of conditions and marine life behavior. In case of an emergency, evacuation would likely involve a boat transfer to Nosy Be and then air transport, which can be time-consuming.

Who it suits — and who it doesn't

FAQ

Tanikely Canyon FAQ