How fishing works now
Every world places groups of fish at random in rivers and lakes. A group shows up as splashes on the surface, and more splashes mean more fish. Noise scares a group off for a while, so clear zombies and keep the car engine off before you settle in.
Each fish you land takes one fish out of the surrounding area (about 40 by 40 tiles). An area that goes five days without a catch refills, and groups drift to new spots every day (one source). If the bites dry up, move along the bank.
Two Build 41 habits are gone: spear fishing was removed, and Fishing skill no longer adds a flat bite chance per level. Skill now decides how big a fish can be, how much junk you hook and how accurate your cast is.

