Every year, from October to March after the monsoon season, thousands of fishermen from various parts of the country, such as Khulna, Bagerhat, Satkhira, Pirojpur, Chattogram, and Cox’s Bazar, temporarily settle here.

To obtain fishing permits, they follow the regular procedures of the Sundarbans East Forest Division, which include acquiring a BLC (Boat License Certificate) and paying a DFC (Daily Fee for Firewood).

In the fiscal year 2018-19, 4,105 tons of dried fish were produced in this region, earning the government revenue of 26.8 million Bangladeshi Taka.

[4][5] The island is also famous for the annual Raas Mela and holy bath, which take place during the Kartik month (Gregorian November) as part of the Hindu tradition.

While it is often said that the Raas Mela has been celebrated for 200 years, historical accounts suggest that the festival was initiated in 1923 by a forest-dwelling devotee of Harichand Thakur, named Haribhajan (1829–1923).

Some enliven the atmosphere by playing musical instruments and singing bhajans and kirtans, filling the surroundings with spiritual fervor.

The Raas Mela at Dublar Char attracts not only local residents but also people from distant cities and even foreign tourists.

Hydrophis nigrocinctus, a species of black-banded sea snake, was rediscovered in bycatch after being unseen for over a century, on this very island.