The fly angler uses a rod longer and lighter than those used for cast and spin fishing. Fly rods can be as short as 2 m (6 ft) long in freshwater fishing and up to 4.5 m (15 ft) long for two-handed fishing for salmon or steelhead. The average rod for fresh and salt water is around 9 feet in length and weighs from 3 –5 ounces, though a recent trend has been to lighter, shorter rods for fishing smaller streams.
The type of cast used when fishing varies according to the conditions. The most common cast is the forward cast, where the angler whisks the fly into the air, back over the shoulder until the line is nearly straight, then forward, using primarily the forearm. The objective of this motion is to "load" (bend) the rod tip with stored energy, then transmit that energy to the line, resulting in the fly line (and the attached fly) being cast for an appreciable distance. Casting without landing the fly on the water is known as 'false casting', and may be used to pay out line, to dry a soaked fly, or to reposition a cast. Other casts are the roll cast, the single- or double-haul, the tuck cast, and the side- or curve-cast.
Dropping the fly onto the water and its subsequent movement on or beneath the surface is one of fly fishing's most difficult aspects; the angler is attempting to cast in such a way that the line lands smoothly on the water and the fly appears as natural as possible. At a certain point, if a fish does not strike, depending upon the action of the fly in the wind or current, the angler picks up the line to make another presentation. On the other hand, if a fish strikes, the angler pulls in line while raising the rod tip. This "sets" the hook in the fish's mouth. The fish is played either by hand, where the angler continues to hold the fly line in one hand to control the tension applied to the fish, or by reeling up any slack in the line and then using the hand to act as a drag on the reel. Some fly reels have an adjustable, mechanical drag system to control line tension during a fish's run.
When actively fishing, the angler may want to keep the fly line lightly pressed against the rod handle with the index finger of the casting arm. The free arm is used to pull line from the reel or to retrieve line from the water. If a fish strikes, the angler can pinch the line with the index finger against the rod handle and lift the rod tip, setting the hook.
Fly fishing can be done in fresh or salt water. Freshwater fishing is often divided into coldwater (trout, salmon, steelhead), coolwater (pike, perch, walleye) and warmwater (bass, chub, catfish) fishing. The techniques for freshwater fly fishing also differ in lakes, streams and rivers

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