The basics on how different types of fly lines work on the water. The picture demonstrates it visually. There are alot of specialty lines like your pike and musky , bass bug, spey , dry fly and salty stuff to get lost with. I remember when I started out a simple level line 5wt was all I had. Then when I started throwing bigger streamers at trout I bought a brand new orvis wt forward 6wt line and I couldn't believe the difference. Anyway just a Little something to share with you all from Pike Adventures. Hope it helps. Tight Lines and sharp hooks!!!!!