The half-day snorkelling trips to Mahatma Gandhi Marine National Park are a fine option for those keen to get underwater while in Port Blair. The park comprises 15 islands of mangrove creeks, tropical rainforest and reefs supporting 50 types of coral and plenty of colourful fish. Boats depart at 9am and 10.30am from Wandoor Jetty, costing ₹750 in addition to the ₹500 permit which you need to pre-arrange from the tourist office in Port Blair.

Depending upon the time of year, the marine park’s snorkelling sites alternate between Jolly Buoy and Red Skin, allowing the other to regenerate.