Members of Coast Guard detained 52 fishermen for catching fish in the waters of the Sundarbans without taking authority's prior permission from Bangabandhur char under Dacope Upazila yesterday. On information, a Coast Guard team from Dubla BCG outpost detained them from the place on Monday night and arrested them and seized 8 lakhs Faisa fish fries, five boats and few nets, said Lt Abdullah Al Mahmud, Coast Guard detective of Sundarbans West Zone. The detainees were handed over to Sundarbans Nilkamal Stations, he added.