সুন্দরবনের ডলফিন ও তিমি অভয়ারণ্য: বাংলাদেশের জলজ জীববৈচিত্র্যের এক অনন্য দলিল
Environment and forest ministry of Bangladesh declared 31 K.M. long channels of the Sundarbans as a safety zone for the six species of dolphins, one species of porpoise, and three species of whales. Including the Irrawaddy Dolphin, the other species are Indo-Pacific Hump-backed Dolphin, Pantropical Spotted Dolphin, Spinner Dolphin, Indo-Pacific Bottlenose Dolphin, Ganges River Dolphin and Indian Ocean Finless Porpoise. Read More