Today’s ABC News Online gives us the headline suggesting an exciting story – “Amateur dive photographer shares snaps of Hobart’s hidden underwater world”.

We are told “Under the surface of the River Derwent you’ll find an otherwise hidden and surprising colourful world of marine creatures.” Accompanying the story are photos of divers and underwater creatures.  Quite startling is the beauty of what divers can see. Wonderful.  The gorgeous photo of a crayfish by Millie Banner attracted my attention – who doesn’t love eating a crayfish. However, “… heavy metal levels in the river make them not safe to eat.”  So please do not go down deep seeking a feed from the waters under the Tasman Bridge.  Besides the river currents might sweep you out to sea.  Maybe.