Sydney's new ferry named Ferry McFerryface

Ferry McFerryface is now officially the name of the last ferry in a new fleet of inner harbour vessels.

According to the Australian Broadcasting Corporation, residents were urged to cast their vote for what the vessel should be named through a website setup for the occasion and by using the hashtag #yourferry.

"This one is for the kids", said NSW Transport Minister Andrew Constance.

The remainder have been named after prominent Sydney Aborigines Bungaree and Pemulwuy and Australian medical doctors Victor Chan, Catherine Hamlin and Fred Hollows.

Boaty McBoatface came fourth, but it was ruled out of contention "given [it] was already taken by another vessel", Mr Constance said.

But the country's Maritime Union, whose members staff the ferry fleet, failed to see the amusing side.

Suggested names were supposed to fall into one of three categories to avoid the Boaty McBoatface issue; Arts and Culture, Connections to Sydney Harbour and Science, Environment and Innovation.

"The transport minister is demonstrating here that he treats public transport as a joke", Garrett told 2GB radio.

'We're wondering why Sydney Harbour has to suffer a second-hand joke from the United Kingdom, ' he said.

The ferries, which will ply the harbours around Sydney, will carry up to 400 passengers. The name Boaty McBoatface was then given to a submersible boat on the ship.

The ferry is one of a new fleet to be put to use in Sydney, and joins a trend of copycats since last year's United Kingdom vote - including a Swedish train named Trainy McTrainface and a racehorse, also from Sydney, called Horsey McHorseface.

A New Zealand-bred racehorse named "Horsey McHorseface" with its own Twitter account has also become a cult hit, after breaking through for his first win in Sydney in June.

Vanessa Coleman

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