The drugs were found with the help of detector dog Meg
Revenue officers have seized 24kgs of herbal cannabis at Dublin Port, with an estimated street value of €480,000.
The discovery on Thursday was as a result of routine profiling.
The illegal drugs were found with the assistance of Revenue detector dog Meg.
They were in a consignment that was said to contain 'goods' when it arrived in Dublin Port from Spain.
Revenue say investigations are ongoing.