The June 29 incident claimed the lives of 34 people.
Senior Judicial Magistrate Monikha Khan passed the order when Sub-Inspector Shahidul Alam of River Police and also the investigation officer of the case, produced him before the court with seven-day remand prayer.
Lawyers, including Dhaka Bar Association President Iqbal Hossain and general secretary Hossain Ali Khan Hasan, moved bail plea for the Mayur-2 owner.
Prosecutor Anwarul Kabir Babul stood for the state and opposed the petition.
Also read: Buriganga launch capsize: ‘Mayur-2’ launch owner held in city
On early Thursday morning, police arrested Mosaddek from his residence in city’s Sobhanbagh.
On June 29, Dhaka-bound ‘MV Morning Bird’ launch carrying around 150 passengers from Munshiganj sank after being hit by ‘Mayur-2’ near Shyambazar in the capital’s old town.
Bodies of 34 people were recovered after the launch capsize.
Also read: Buriganga death toll climbs to 33
Mohammad Shamsul, sub-inspector of Sadarghat River Police Station, filed a case at South Keraniganj Police Station the following day.
On July 7, police arrested Abdus Salam, a staff of the launch and he was put on a three-day remand by a court on that day.
Also read: Buriganga launch capsize: Accused put on 3-day remand