Minecraft wiki entry for Fishing, associated text: The fishing rod can occasionally catch treasure or junk instead of fish. A fishing rod without the Luck of the Sea enchantment has an 85% chance of catching fish, a 10% chance of catching junk, and a 5% chance of catching treasure. Each level of the Luck of the Sea enchantment increases the chance of catching a treasure at the expense of reducing the chances of catching fish and junk. The Luck status effect grants the same benefit.