Bangladesh Coast Guard seized 800 kilogrammes of venison from Patharghata upazila in Barguna on Saturday night.
A man named Abdus Sobhan was arrested in this connection, said Lt Bishwajit, commander of Patharghata Coast Guard station.
Acting on a tip-off, a Coast Guard team conducted a drive in Bihangadip area of the upazila and seized the venison from an engine-run boat.
The team detained Sobhan and seized the boat also, said Lt Bishwajit.
The venison would be handed over to the forest department, he added.