The Ramanathapuram Chief Judicial Magistrate remanded them to judicial custody late last night, officials said.
They said the fishermen would be lodged in prison in Tuticorin till April 1.
The fishermen had put out of sea on Mar 14 and had drifted to the Indian coast on Mar 17 and were nabbed by the Coast Guard yesterday. Their boat was seized and they were brought to Tharuvaikulam in the district and handed over to Coastal Marine Police.