Put the flour on a large plate and season with salt and pepper. Pat the fish dry and dredge lightly in the seasoned flour, shaking off any excess.
Heat 2 Tbs. of the oil in a 12-inch, heavy-duty, skillet over medium-high heat until shimmering hot. Cook the fish in batches without crowding until golden and crisp, 4 to 5 minutes a side for whole fish, or 2 to 3 minutes a side for fillets, and transfer to paper towels to drain. Wipe the pan clean and add more oil between batches as needed.
Heat 3/4 cup of the oil, the garlic scapes, green garlic or scallions, and morels in a saucepan over medium heat until the green garlic is just starting to color, 3 to 4 minutes. Transfer the morels to a small bowl. Add the red wine vinegar and cook 1 minute. Return the morels to the pan, remove from the heat, and season with salt and pepper.
Place the fish on a serving platter, and spoon over the skillet dressing. Serve with the lemon wedges.