Oh, your fishing skill is going up. You are at level 1/99.
I was always interested in fishing, but the closest I ever got was underwater fishing (With harpoons and stuff, I'm from an island so that's the most common way of fishing there).
That kind of fishing scared the shit of me sometimes because fish in open sea are big as shit. The first few times you get pretty scared.
I've never tried that. My fear of water would probably take me out before I even got close to any fish.