Mahatma Gandhi Marine National Park

1. Geographical Architecture & The 15-Island Archipelago

Mahatma Gandhi Marine National Park encompasses 281.50 square kilometers of marine open waters, coral reefs, and 15 uninhabited islands located off the southwest coast of South Andaman Island. Notified in May 1983 under Section 35(1) of the Wildlife (Protection) Act of 1972, the sanctuary was established with the explicit conservation objective of protecting endangered marine wildlife, particularly nesting sea turtles, dugongs, and intact hermatypic coral reefs from commercial exploitation and unregulated trawling.

The park's 15 islands comprise: Alexandra, Red Skin, Boat, Hobday, Grub, Chester, Bell, Pluto, Snob, Tarmugli, Twins (East and West Twins), Malay, Rutland (partially included), and the famous Jolly Buoy Island. Tarmugli is the largest island in the archipelago, blanketed by dense mangrove creeks and extensive sandy shores that serve as an inviolable nesting rookery for marine turtles. The islands are separated by deep marine passages including the Alexandra Passage and the Labyrinth Strait, where strong tidal currents flush the reef systems with nutrient-rich oceanic waters.

The coastal bathymetry surrounding these islands features a classic zonation pattern: shallow reef flats extending from 50 to 300 meters from the shoreline, transitioning into a defined reef crest where ocean waves break, followed by a dramatic outer reef slope that plunges into depths of 20 to 45 meters.

Geologically, the islands are emergent peaks of a submerged tertiary volcanic and sedimentary mountain chain that extends from the Arakan Yoma in Myanmar to the Mentawai ridge in Sumatra. The terrestrial interiors of the larger islands (Tarmugli, Alexandra, Hobday) support dense Andaman Tropical Evergreen and Semi-Evergreen forests, creating a seamless transition from terrestrial canopy to underwater coral gardens.

2. Scleractinian Corals & Marine Biodiversity

The coral reef ecosystems of Mahatma Gandhi Marine National Park represent one of the most structurally complex and biodiverse marine habitats in the Indian subcontinent. Over 50 genera of stony corals (Scleractinia) and extensive soft coral communities flourish across the fringing reefs and patch banks.

Dominant Coral Taxa

The reef crests and outer slopes are dominated by massive and branching corals including Acropora (Staghorn and Table Corals), Porites (Boulder Corals), Montipora, Favia, and Pocillopora. In sheltered reef lagoons, delicate Gorgonian sea fans, sea whips, and sea anemones form intricate micro-habitats for clownfish (Amphiprion species), damselfish, and nudibranchs.

The park provides critical refuge for over 250 species of demersal and pelagic reef fishes, including the Giant Grouper (Epinephelus lanceolatus), Napoleon Wrasse (Cheilinus undulatus), Moorish Idol, Parrotfish, Butterflyfish, and Blacktip Reef Sharks (Carcharhinus melanopterus) that patrol the shallow reef flats during rising tides.

Marine invertebrates are exceptionally diverse, with giant clams (Tridacna gigas and Tridacna squamosa), crown-of-thorns starfish, sea cucumbers (Holothuroidea), and ornamental marine mollusks thriving across the reef flats. The mangrove forests bordering Wandoor and Alexandra Island shelter thriving populations of mud crabs (Scylla serrata), mangrove snails, and juvenile commercial fishes that utilize the prop-root nurseries before migrating to open coastal reefs.

3. Keystone Species & Marine Megafauna

Cetacean species frequently recorded in the open marine passages around the park include the Indo-Pacific Bottlenose Dolphin (Tursiops aduncus), the Spinner Dolphin (Stenella longirostris), and occasional migratory pods of False Killer Whales.

Coral Bleaching Resilience & Reef Monitoring Transects

The coral reefs of Mahatma Gandhi Marine National Park serve as an internationally celebrated natural laboratory for studying marine thermal resilience. Following severe El Niño Southern Oscillation (ENSO) elevated sea surface temperature events in 1998, 2010, and 2016—which triggered widespread coral bleaching across the tropical Indian Ocean—scientists from the Zoological Survey of India (ZSI) established permanent underwater monitoring transects around Jolly Buoy, Red Skin, and Tarmugli islands.

The data revealed exceptional natural recovery rates: while shallow staghorn corals (*Acropora*) experienced heavy initial mortality, massive brain corals (*Porites* and *Favia*) demonstrated remarkable physiological resilience, acting as thermal refugia. Over 65% of live coral cover regenerated within seven years of major thermal stress episodes. Marine biologists attribute this high resilience to the intense, continuous tidal flushing through the Labyrinth Strait and Alexandra Passage, where cold, oxygenated deep-sea waters prevent localized thermal accumulation and flush away coral metabolic wastes.

The Plastic-Free Mandate & Wandoor Environmental Security

Mahatma Gandhi Marine National Park was India's pioneer protected area to enforce a mandatory, zero-tolerance single-use plastic ban. Prior to boarding the morning passenger vessels at Wandoor jetty, every traveler undergoes strict baggage inspection by Forest Department eco-rangers. Plastic water bottles, disposable food wrappers, and polythene bags are strictly impounded.

Visitors are issued reusable stainless steel water flasks against a refundable security deposit at the entrance counter, ensuring that zero non-biodegradable synthetic waste enters the marine lagoon ecosystem. Furthermore, tourists are prohibited from applying non-reef-safe chemical sunscreens prior to water immersion, protecting delicate coral larvae during seasonal spawning phases.

4. Rotational Tourism System: Jolly Buoy vs Red Skin Island

To prevent coral bleaching and ecological degradation from visitor concentration, the Department of Environment and Forests operates a strict rotational ecotourism protocol:

Seasonal Island Access

• Jolly Buoy Island (Open November to April/May): Celebrated for crystal-clear turquoise waters and high-density coral gardens. Accessible via licensed forest department ferries departing from Wandoor Jetty. Jolly Buoy is closed for six months during the monsoon to allow coral regeneration.
• Red Skin Island (Open May to October/November): When Jolly Buoy closes, Red Skin Island opens to visitors. Features extensive mangrove fringes, coastal nature trails, and sheltered reef snorkeling channels.

All visitors are strictly required to return to Wandoor Jetty by late afternoon; overnight camping on any island in the park is illegal. The park enforces a comprehensive Zero-Plastic Policy: all single-use plastics are checked and confiscated at Wandoor Jetty.

5. Master Day-Trip Expedition Blueprint to Jolly Buoy Island

To maximize wildlife spotting and reef exploration during an authorized day excursion to Jolly Buoy Island, travelers should adhere to the following operational timeline:

6. Permitting Protocol, Costs & Logistics

Visiting Mahatma Gandhi Marine National Park requires advance permit clearance from the Forest Department counter at Wandoor or the IP&T Directorate in Port Blair.

Step-by-Step Booking Guide

1. Forest Entry Permit: Obtained at Wandoor Jetty on the morning of travel (or pre-booked through registered tour operators). Entry fees are ₹50 for Indian nationals and ₹500 for foreign citizens. Professional camera permits carry additional charges.
2. Ferry Ticket: Round-trip passenger ferry boat tickets (approximately ₹850 to ₹1,000 per person) must be purchased from authorized boat operators at Wandoor.
3. Glass-Bottom Boat & Snorkeling: Glass-bottom coral safari boats operate directly from Jolly Buoy/Red Skin beaches, charging regulated fees (₹500 to ₹1,000 per ride) for 20 to 30-minute guided reef tours.

Transit from Port Blair

Wandoor is located 29 kilometers southwest of Port Blair. Taxis take 45 minutes along the Wandoor Road via Sippighat. Public buses depart every 30 minutes from the Aberdeen Bazaar and Mohanpura bus stations in Port Blair.

7. Frequently Asked Questions

8. Coral Bleaching Monitoring & Scientific Conservation Studies

The coral reef ecosystems of Mahatma Gandhi Marine National Park have been the focus of continuous decadal scientific monitoring by the Zoological Survey of India (ZSI) and the National Institute of Ocean Technology (NIOT). The reefs suffered severe thermal stress events during the global El Niño sea surface temperature spikes of 1998, 2010, and 2016, where water temperatures in the shallow lagoons exceeded 31°C for several consecutive weeks.

Studies conducted across permanent transects at Tarmugli, Jolly Buoy, and Red Skin demonstrated remarkable natural resilience, with fast-growing Acropora and massive Porites colonies recovering over 65% of live coral cover within six to eight years of major bleaching episodes. This high rate of natural recovery is attributed to the intense tidal flushing through the Labyrinth Strait and the complete absence of terrestrial industrial contaminants or sewage discharge in the protected park waters.

Underwater Photography & Equipment Recommendations

For underwater photographers capturing the reef diversity at Wandoor, wide-angle fisheye lenses (such as 8-15mm or 16-35mm) paired with dual external underwater strobes are essential to illuminate the vibrant colors of soft corals and anemonefish in the upper 10 meters of water. A dome port with anti-reflective coating prevents optical distortion when photographing schooling barracuda and reef sharks along the outer drop-offs.

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