Chauhali Upazila Nirbahi Officer (UNO) Md Anisur Rahman passed the sentences.
The mobile courts operated the drive acting on a tip-off at different points on the Jamuna River in the morning.
They seized 50 kilograms of hilsa and one lakh metres of current net and several fishing boats during the drives.
Later, the fish were donated to a local madrasa.
Also read: Nineteen fishermen jailed for catching hilsa in Sirajganj