When facing water, open your bag and go to key items. There select the Super Rod and then use it.
in route 226 and use super rod
use a super rod in the ocean near lilycove
Use the Super Rod in Lilycove City.
In the Pokemon League. NEar the waterfall. Use a super Rod
use a super rod in the sea and you will find waillimer or sharpedo
on rount 119 note use super rod
Go to meteor falls and use a super rod.
Good or Super rod. You have to fish right at the entrance of Victory Road.
use a super rod on route 131 and you will get one they are pretty common :)
U find it in EverGrande City. U have to use a super rod
You can find Carvanha in Route 119, use your Super Rod. If you want Sharpedo (final form of Carvanha), you can find it near Mossdeep City, use your Super Rod.
FeebasUse a Super Rod.