Lots of dolphin experiences in Jervis Bay with three resident pods. One of the best was on a wave last summer: husband yells 'look over your left shoulder' and there was a dolphin right beside me surfing the same wave - could have touched it.
More recently and on less of a 'best experience' note, was training on the river
paddling hard across a shallow seagrass bed a bit less than 0.5m deep: head down going for it and all of a sudden the board gets this massive jolt from below!!! I look and half a meter out to either side of the board is a giant 'wing' breaking the surface. I had gone directly over a giant stingray very well camoflaged with the bottom. I had startled him so he has come up and whacked his head on the bottom of my board and started flapping his wings to escape at full speed!!! (this thing was as big as a small car!!!!!).
Photo is of a much smaller one but you get the idea!. Change of undies material!
Other sightings while SUPing in the bay - a seal frolicking around about 100m from our little wave, Penguins feeding right beside us, A sea eagle dived, caught a fish and then proceeded to eat it in the tree all within 20m of me.
Oh the joy of SUP !!!!
My sister lives on Coochiemudlo Island, and we all went for a paddle around the island yesterday and i was lucky enough to have a Dugong pop up ever so quickly beside me, poke his little face out, before diving back under and swimming away. It was awsome. We also had 2 turltles swim past us on the other side of the island. Great day, also managed to stay on my board, and catch some runners 
