Yes, Redfish got legs. It's true. Here's a similar, earlier image of what I observed yesterday at high noon:
The greatest difference in what I observed yesterday is that that particular redfish had placed himself half out of the water of his own accord and was cruising with his eyes in and out of the water just like in the picture as he hunted for, as I observed, little dime and quarter sized crabs of what appeared to be the blue variety. His splayed pectorals were possibly functional--at least partially--as legs over the sand and seagrass, though his tail I think did most of the forward propulsion work as I watched him. Cruising along slowly, he would occasionally have to rise up out even more of the water, his belly on the sand, as he crested the hard sand ridges of stingray beds dug into the sand in this particular spot. The topography demanded it. On the crest of the ridge, this fish would tuck in those backward-sweeping pecs to narrow his profile and I believe, provide a backward thrust. Critically, he maintained buoyancy at all times, and never appeared to approach actual "beaching" of himself. But he walked that edge, man. He was living.
Some forty feet away, I cast a fly vaguely in front of him and he slowly and casually vanished into the glare of the deeper water at the edge of the sand flat. I think he'd seen me before I cast.