Tales of giants
This tail that's looming above my head is that of a Humpback whale that was "sailing" off Seven mile reef at Sodwana last week. The creature was inverted, and seemed to use this position to vocalise, using all sorts of wails & grunts to communicate with other individuals.
The story can be seen at http://www.earth-touch.com/result.php?i=Swimming-with-the-whales