The fishermen from Pudukottai were arrested and their boat impounded while fishing in Karai Nagar sea by Sri Lankan Naval personnel, Pudukottai Joint Director of Fisheries H D Shekar said.
The fishermen were taken to Jaffna and produced before Oorkavalturai court Magistrate M M Riyas who remanded them to judicial custody till March 24, officials said.
Eight fishermen were arrested on March 3 while 29 others on March 6 by the Sri Lankan Navy at different locations in mid sea.