Environment (DoE), with the assistance of the UNDP, demonstrates that the island has a number of ecosystems, including coral-rich areas, mangroves, lagoons and stony areas. The island is a safe haven to various species of fauna. The presence of 153 species of sea weeds, 66 species of coral, 187 species of oysters, 240 species of fish, 120 species of birds, 29 species of reptiles and 29 species of mammals were recorded at the St Martin's Island in 2010. The area in vicinity has been declared as a Marine Protected Area in 2022. S.I. Paul et al. (2021) collected 9 species of marine sponges (phylum: Porifera) from the Saint Martin's Island. These are: Niphates erecta, Mycale macilenta, Plakortis dariae, Cliona celata, Cliona carteri, Cliona viridis, Haliclona rosea, Haliclona oculata, and Hemimycale columella. Marine sponges and their associated microbes produce an enormous array of antitumor, antiviral, anti-inflammatory, immunosuppressive, antibiotic and other bioactive molecules. S.I. Paul et al. (2021) explored a total of 15 bacterial genera comprising 31 different bacterial species from the 9 collected marine sponges of the island. Among them Bacillus subtilis strains WS1A and YBS29 have great probiotic potential. It can produce antimicrobial compounds and prevent motile Aeromonas septicemia disease (a major fish disease in Bangladesh) of Rohu (Labeo rohita). Bacillus subtilis strains WS1A and YBS29 produce different types of antimicrobial peptides. Fish (Labeo rohita) fed with extracellular products of Bacillus subtilis strains WS1A and YBS29 develop complete disease resistance. The metabolites and bioactive compounds derived from marine sponges and sponge microbes also afford abundant potential for pharmaceutical and biotechnological applications. Transportation The only way to reach Saint Martin Island is by water transportation: boats and ships (mostly for tourists) from Cox Bazar and Teknaf. It is the southernmost union of Bangladesh situated in 120 km away from the Cox’s Bazar city. The only internal transport for island is non motorized van (pulled by man.) The roads are made of concrete, and their condition are decent. All most hotels run generators until 11 PM which are not allowed afterwards, so they then rely on solar power, which is popular throughout the island. There is no electricity supply from the national grid since a hurricane in 1991. Tourism Saint Martin Island has become a tourist spot, and Eight shipping liners run daily trips to the island. Nowadays, tourist has become friendly to Eco tourism. Consequently, eco friendly resort- Josnaloy Beach Resort