I'm not so sure paddlefish prefer moving water. Paddle fish do grow in large rivers. But generally, zooplankton populations are much greater and comprised of larger species in standing water than moving water (rivers). Paddlefish do well in lakes with ample zooplankton. Paddlefish prefer the larger species of zooplankton. Farms that sell paddlefish could get them form aquaculture facilities that fed them pellets - ask about this when checking on paddlefish.
