Welcome Passage separates South Thormanby Island from the mainland along the Sunshine Coast .
There are several small islands attached to South Thormanby island , including Pirate Rock and Merry Island to the South .
Welcome Passage separates South Thormanby     from the mainland along the Sunshine Coast .
There are several small islands attached to South Thormanby island , including Pirate Rock and Merry Island to the South .