
As azurelith found in Kun-Lai Summit, there is a pool of tameable water striders called Lightfooted Snapclaws. The pool is below a waterfall leading into the ocean, just north of the Z in 'ZOUCHIN VILLAGE' on the map.


They're huge after taming! They have a sort of slow, fluid pulse of light that brightens and then dims their colour constantly. It's pretty neat, and I don't find it rapid or obvious enough to be annoying.
I tried to capture both the lightest and darkest hues of the glow:

