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Johnny Gaskell has a penchant for searching Google Maps, but was amazed the tool uncovered the blue hole

A marine biologist couldn’t believe his luck when he discovered a gaping blue hole under the surface of the water in the Great Barrier Reef.

Johnny Gaskell has a penchant for searching Google Maps, but was amazed to use the tool to uncover the ‘blue hole’.

According to Amusing Planet, a blue hole is an underwater sinkhole formed by the erosion of carbonate rocks.

After spotting the rare phenomenon online, Mr Gaskell decided to investigate in real life.

As a local of the Whitsunday Islands in Queensland, the marine biologist lives on the edge of the Great Barrier Reef.