There are mites, spiders, and SPIDERS. This fellow fits into the latter catergory.
It's one of our local big-river fishing spiders in the genus Dolomedes, and is probably D. scriptus.
They don't spin webs but use the water surface as a web, attacking insects that land on the water surface.
It is reported that these spiders enter beneath the surface to catch insects and small fish - thus a fish-eating spider!
They often rest with their legs stretched out in front and behind, this spider measured 6.8 cm from leg tip to leg tip when resting.
A vouchered specimen: digital SLR + 105mm Micro + 4T close-up 'filter'; f 22 on lens; Helicon Focus stack of 12 exposures each as 0.63 mm spacing.
Cropped.
