The fishermen's relatives held protests in front of the Ministry of Fisheries and met Minister Rajitha Senaratne.
"They highlighted the difference of treatment meted out by the Lankan and Indian authorities," Narendra Sri Rajapaksha, the ministry spokesman, told PTI.
Some 107 fishermen and their 21 trawlers are under Indian custody for breaching the International Maritime Boundary Line across the Palk Strait.
Most of them from the western coast belt have been in Tamil Nadu jails since August, a Sri Lankan official said.
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"The minister explained to them the diplomatic action the minister had initiated to secure their release," he said.
Some of the relatives, however, charged that the Ministry was not doing enough as they protested in front of the ministry compound.
The issue of fishermen indulging in illegal fishing is a major irritant in India-Sri Lanka ties.