Minecraft wiki entry for Fishing, associated text: A raw cod, raw salmon, pufferfish, tropical fish, junk, or a treasure item appears (see junk and treasure below), flies toward the player, and is added to the player's inventory. Normally, the item flies directly to the player's position, but if there are blocks in the way, it may hit those and bounce off at an angle.
The rod's durability is reduced by 1 point. This can vary depending on the circumstances; see below.
An experience orb worth 1–6 experience points spawns at the location of the player doing the fishing. Consequently, a Mending-enchanted fishing rod used only for fishing never wears out and actually repairs itself if damaged.