J M Johnston 1848 Humpback Salmon 24 11 March Body taking on more fish like proportions than it had again. 21 March More - 1 April 14 Aug. Holkham Bay Alaska Duck Creek, At a place in the creek where the stream spreads out over a bar, where the rocks are fist size or less, it is about 25 ft wide x 6 in. deeep. Small channels in this bar will run about 10 in deep. In one of these small channels there was a hollow 2 ft wide x 3 ft long that ran about a foot deep. In it were two Humpies, a ♂ and a ♀. [The female usually measures about 18in long, 4.5 vertically.