A little catfish that swims around your desktop. It wanders on its own, leaves a faint ripple behind its tail, and can chase your mouse cursor.
Grab the file for your system from the Releases page:
| System | File |
|---|---|
| Windows | CatfishPet-windows.exe |
| macOS (Apple Silicon) | CatfishPet-macos-arm64.zip |
| macOS (Intel) | CatfishPet-macos-x86_64.zip |
| Linux | CatfishPet-linux |
Windows: double-click the .exe. If SmartScreen shows a blue warning
because the app isn't signed, click More info → Run anyway.
macOS: unzip, then right-click CatfishPet → Open (the app isn't
signed, so a normal double-click may be blocked the first time). To skip
that check: xattr -dr com.apple.quarantine CatfishPet.app.
Linux: chmod +x CatfishPet-linux && ./CatfishPet-linux. The Linux build
uses a shaped window, so it has no wake ripples and the global shortcuts are
unavailable — use the right-click menu instead.
| Action | What happens |
|---|---|
Mouse wheel / + - |
Make the fish bigger or smaller |
| Drag the fish | Move it somewhere (it resumes swimming after a bit) |
Ctrl+Shift+F (Windows) |
Toggle follow-my-mouse mode (press again to go back to wandering) |
| Right-click the fish | Menu: follow mode, size presets, swim speed, ripples on/off, pause, quit |
Space |
Pause / resume |
Q or Ctrl+Shift+Q (Windows) |
Quit (Ctrl+Shift+Q works from anywhere) |
To stop it, right-click the fish and pick Quit.
Works across multiple monitors — the fish roams the whole desktop.
Needs Python 3.10+ with Pillow:
pip install pillow
python fish_pet.pyOr on Windows just double-click run_fish.bat.