Acting on a tip off that the drug was being sold across the city, particularly near colleges, police formed a special team to monitor such cases, a police press release said.
The team nabbed Ganesan, a frequent offender for allegedly selling the ganja, brought from Andhra Pradesh, to college students and auto-drivers, it said.
Ganesan had twice been been jailed for the same crime in the past, the release said, adding the ganja was seized from him during questioning.