This is the extremely rare moment a confident humpback whale has been caught on camera showing off his massive 10-foot penis during a spectacular show in Sydney Harbour. Hey, if youve got it, flaunt it.

Despite photographing thousands of whales in his life, John Goodridge said he has never before witnessed one with its penis on full display – that is until now.

The 54-year-old captured the incredible photograph while on a Go Whale Watching cruise on the weekend (13 June) that was operating out of Sydney Harbour, Australia.

Elated John said he did not notice the 40 tonne whales massive appendage at the time and was shocked to see it later on when examining his photographs from the day.

According to WhaleFacts.org, a humpback whales penis can grow up to 10ft long – which is even bigger than the tallest man who ever lived, Robert Wadlow, who stood at 8ft 11in.

The UK expat, who moved from Yorkshire to Australia 25 years ago, said: “It certainly isnt every day that you get to see something like that. It is incredibly rare to see and there is not really that many photographs out there showing a humpback whales penis.

“In fact, Ive never even seen a photo of one showing it off during a breach. Usually it will remain inside their genital split which protects it from injury as they swim.

“Ive photographed thousands of whales and have never captured anything like this before, so it was certainly exciting.

“It is possible that is had just finished mating and then came up to breach in front of us. There were a few whales around at the time.”

The cruise was operated by skipper Simon Millar on his small family business Go Whale Watching that has operated out of Sydneys Darling Harbour for over ten years.

Australias eastern coastline comes alive each year between April and November, as pods of humpback whales make the 10,000km (6214 miles) journey from Antarctica to Australia in order to mate and give birth.

This might also explain why an elusive white humpback whale known as Migaloo was spotted days ago.

The whales name means white fella in several Indigenous languages.

The White Whale Research Centre and Great Barrier Reef Legacy have a dedicated account for Migaloo to let everyone know about the whales movements.