For trout spoon fishing smaller rivers and stream it's best to stay light and small in your spoon choice and keep the rod tip up which will help the spoon run shallow. Spoon Colors Color as with any trout lure will have a big effect on your catch rate and is influenced mostly by water conditions and weather. Fishing spoons have a simple design, an oblong shape, concave on one side that catches water producing a wobble and light reflection flash imitating a fleeing or crippled bait fish.