This is the amazing moment a humpback whale emerged from the tranquil waters of a lazy dock.

Workers at Clover Pass Resort in Ketchikan, Alaska, were going about their daily business when they spotted the huge mammal swimming underneath the wooden paths over the sea.

After spotting the huge mass about five feet away from the dock, the workers rushed to the edge of the boardwalk to take a closer look.

They caught the huge whale on camera as it moved closer towards them and breached the water.

Workers at Clover Pass Resort in Ketchikan, Alaska, were going about their daily business when they spotted the huge humpback whale swimming underneath the wooden boardwalk. It is pictured breaching the water

Spouting water, the humpback whale glided through the gentle seas and, at one point, even popped head first out of the water in an apparent bid to try and 'bubble feed'. Workers managed to catch the rare sight on camera

Spouting water, the humpback glided through the gentle seas as the workers looked on in amazement at the rare sight.

At one point, it even popped head first out of the water in an apparent bid to try and 'bubble feed'.

Bubble net feeding by humpbacks involves circling a school of fish by blowing bubbles, which in turn prompts them to the surface.

The whales will dive below a shoal of prey, approximately 50 metres, and then slowly begin a 'spiral' towards the surface - blowing bubbles in a circular motion, which can be seen on the surface.

The bubbles congregate the prey and forces them towards the surface near the centre of the circle.

The whale is then able to break through the bubbles and swallow a large number of fish at once.

It is quite unusual for the creatures to swim so close to the shore, and they are often difficult to capture on film – especially when they are bubble feeding.

Juan Christensen, who captured the incredible footage of the humpback whale, said it was just a 'normal day working on the docks' when he spotted the rare sight. He added: 'It was a great day to have a camera'

Bubble net feeding by humpbacks involves circling a school of fish by blowing bubbles, which in turn prompts them to the surface. The whale is then able to break through the bubbles and swallow a large number of fish

Juan Christensen, who captured the incredible footage, said it was just a 'normal day working on the docks' when he spotted the rare sight.

He said: 'All of sudden, right behind me [about] 5ft away, comes feeding out of the water a humpback whale swallowing everything in its path.

'By the time I turned around the whale had already submerged itself, nowhere to be seen.

'So me being a freak for nature photography got my Samsung Galaxy out and started to record in hope that this amazing creature would soon come bubble feeding again, and what do you know I catch a glimpse from the docks again.

'It was a great day to have a camera.'

Mark Andrew, of Oasis Alaska Charter, said of the footage: 'There's something about that place the whales love. Maybe all the fish cleaning attracts the fish they like to eat?'

The whales will dive below a shoal of prey, approximately 50 metres, and then slowly begin a 'spiral' towards the surface - blowing bubbles in a circular motion, which can be seen on the surface (as seen pictured above)