Free picture puzzles · no sign-up
Puzzles from below the waterline
Thirty-six pictures of reefs, kelp, rock pools and shorelines, cut into jigsaws, slide puzzles, swap puzzles and turn puzzles. Pick a dive and play in the browser; your progress waits for you on this device.
Today's tide
Conch shell and sand dollars
Slide puzzle · 4 × 4
One puzzle a day: the same picture and the same deal for everyone.
Play today's tide
Pick up where you left off
Four ways to play a picture
Each game uses the same pictures in its own way. All four work on phones and computers, with undo, hints and autosave.
Dive sites
The pictures are grouped into six habitats. Each picture has four numbered dives, from a quick snorkel to a long deep dive.
About these puzzles
Reef Jigsaw is a set of picture puzzles about life in and around the sea. Each picture appears in four games: a classic jigsaw with curved pieces, a slide puzzle with one gap, a swap puzzle and a turn puzzle. The 144 numbered dives are fixed puzzles — same picture, same game, same cut — so you can work through them in order and stamp each one in your logbook.
Each dive page also tells you something about the picture: what is in the frame, which colours it is made of, how much of it is plain water, sand or sky, and where to begin. Everything runs in the browser without an account. There are no ads and no tracking, and your saved games never leave your device.