In Shallow Sea, a multi-layered puzzle board game inspired by the breathtaking beauty of the Great Barrier Reef, players create their own vivid ocean landscapes by strategically arranging an array of marine life, colorful fish, and corals. Unlike typical puzzle games in which pieces merely stack up, the elements in Shallow Sea can activate, deactivate, and even move, creating exciting combos and thought-provoking dilemmas that keep you on your toes. On your turn, choose tiles showing fish, coral, or sea life, and place them on an empty space on your board. When fish surround a coral of the same color, you flip over the completed coral, which becomes a home for fish. Choose which fish will inhabit the coral, keeping the puzzle and ecosystem cards in mind. Use seashells to lure fish and move them, ideally completing multiple coral at once if you build them strategically. Invite other creatures to enrich your ocean, trying to match the distinct scoring requirements of the ecosystem cards in order to score the most points.