Auckland ferry operator Sealink says trains are gobbling up too much public money, depriving the two-harbour city of superior water transport.
It claims in a submission to Auckland Transport that billions of dollars are going to the least efficient transport service - one "generally located in the least desirable parts" of the city.
"Auckland's defining feature is its maritime environment and ferries historically played a far more significant role in the city's public transport than they do currently," the submission says.
Sealink managing director Todd Bolton told the Herald that 70 per cent of Aucklanders lived within 3km of the coast.
The company wants Auckland Transport to back a wider network of passenger ferries to reach suburbs such as Howick and St Heliers in the east and Browns Bay and Takapuna to the north.