Have you lost your mind!
I got to 1-99 fishing fairly easy, but with profit included.
And let me tell you, the biggest mistake is starting lobs at 40 -- everybody thinks that's the way to go, but that is the slowest fishing you'll ever encounter in your lifetime.
Only fish lobs around 55+ fishing if you actually want to get some exp/profit per hour out of it.
1-15 Shrimp/Anchovies
15-30 Trout @ Barb village
=-=-=-=-=2 Routes from here=-=-=-=-=
30-99 Fishing [recommended route to 99 fast] Trout + Salmon @ Barb Village (super fast fishing as your level increases) [YOU POWERFISH THESE]
30-55 Trout + Salmon ---> 55--80 Lobsters @ Catherby --> 80-99 Sharks (note that I started sharks at 80, to save more time for profit/xp in later stages of fishing)
^^follow that guide and you'll be making money/bunch xp per hour !
Lastly, the script i used is http://osbot.org/forum/topic/12470-free-fir3-fishany-aio-fisher-full-path-recovery-death-walk-buy-from-store-etc/
You can see me 15+ hour proggies at fishing guild with sharks, however I didn't think the bot covered hopping bot worlds @ the time, so I was banned for 2 days.
Good luck