A young humpback whale calf plays with a group of swimmers in the South Pacific Ocean, Tonga.

The clip, filmed on September 20, shows the whale swimming closely to the group of divers before inspecting them and playing along with them while its mum watches on from a distance.

Amateur underwater photographer, David Edgar, told Newsflare: "This young humpback whale was only a few months old and was extremely curious about the people in the water. His mother (in the background) was happy to let the young calf play with us for over half an hour."

A young humpback calf plays with a group of swimmers in the South Pacific Ocean, Tonga. Humpback whales venture to the south pacific islands of Tonga each year to give birth to their young. This young humpback whale was only a few months old and was extremely curious about the people in the water. His mother (in the background) was happy to let the young calf play with us for over half an hour.

- I'm an amateur underwater photographer, based in Sydney. I'm 31 years old
- I've been swimming with whales for about seven years now.
- A number of divers, including my wife, Alice Edgar. (the one in the red bathing suit)
- I'm happy to be named in the story