Ok this is my first guide so don't get mad at me if u don't like it ok here it goes.level.1-level.20 fish crayfish can be caught behind lumby church and caught with crayfish cage can get from fishing tutor near lumby swamp.level.20-level.30 fish trout can be caught at the river in lumby with fly fishing rod anf feathers i don't know how much u have to catch buy feather at the grand exchange buy 2k thats about 20k or kill chickens and collect them they drop feathers 5-15.level.30-level.35 salmon same as trout.level.35-level.45 catch tuna caught at karamja docks with harpoon need 30 coins if u need money sell youer tuna at the general store their in karamja.level.45-level.60 catch lobster at karamja docks caught with lobster pot bring 60 coins this time bank them at either falador or draynor bank because they cost alot at g.e most easiest at to make money.level.60-level.99 catch sword fish bring 30 coins sell the caught tuna if u want or drop them all go back and bank sordfish in a bank near by.