A player's fishing level can only decrease through a Roll Back if they are caught botting as it is against the Rules of Runescape.
Fishing salmon requires a Fishing Level of 30.
level 138. there is no higher level on runescape (for players)
you need level 68 fishing, or 63 with admiral pie, or 65 with fishing potion
Combat Level will never be affected by your fishing level. It is possible to be combat level 3, and have 99 fishing.
You need level 30 fishing to fish salmon.
Yes, you must be a member to enter the Fishing Guild in RuneScape. The Fishing guild is north of Ardougne, inside the members-only portion of RuneScape.
You will need level 76 Fishing, then fish for them either at Catherby, or the fishing Guild.
You need to have at least level 56 Fishing with 196,867 Xp to get to the highscores.
1 month
You need a fishing level of 40 or above to fish lobsters.
Level 138..... although enemies (not other players) can be over level 700!
about level 90, monkfish have better xp and are faster to catch.