However if the trout have been in the river for a time they can become quite picky and subtle imitations may be required to entice them. Tubes can be tied on small diameter polythene tube so short that there is no room for a body. The fly consists merely of a little hair around the tube. If the fly is long enough to have a body, black floss with a silver rib is as good as any. For many anglers the quintessence of sea trout is night fishing.
Some planning is essential however.
Safety depends on seeing the pools in daylight, figuring out where the trout will be concentrated and where it is safe to wade. Look around for overhanging bushes that will reach out and grab your flies in the dark and trees that will devour your back cast. Choose pools that suffer little disturbance during daylight. Sea trout that have are settled are much more willing to rise to the fly than those that have been harried during the day. At night keep your casting simple and reasonably short, throw open loops that prevent tangles especially if you have two flies on the leader.