Sudoku puzzle game. Catch fish and grow your own aquarium
Aquarium Sudoku: Brain Puzzle — description
Aquarium Sudoku is a Sudoku puzzle game where every puzzle you solve reels in a new fish for your own aquarium.
Train your brain with classic number puzzles, build a daily habit, and fill your tank with 45 species across four rarity tiers.
FEATURES • Classic 9×9 Sudoku with a guaranteed unique solution • 342 graded puzzles — every board solvable by pure logic, no guessing • Puzzles adapt to your skill as you play • Four difficulty levels — Easy, Medium, Hard, and Expert • Watch your catch reel in as you solve — the bar fills with every correct number • Collect 45 species across four rarity tiers and watch them swim in your tank • Catch of the Day — a daily puzzle, and the only place to land a UR fish • Streak calendar — solve a puzzle each day to keep your streak alive • Unlock new tank themes as your collection grows • Helpful tools — pencil notes, undo, erase, and hints • Calm sound effects and a clean, distraction-free design • No ads and no in-app purchases • Plays 100% offline — no account, no sign-up, no internet needed
Whether you love brain games, logic puzzles, or just a calming way to unwind, Aquarium Sudoku turns your daily number puzzle into a collection you'll want to come back to.
Solve, collect, and grow your aquarium, one puzzle at a time.
Latest version
Version
1.6.0
Update
Jul 28, 2026
Package ID
ai.nextad.aquariumsudoku
What's new
Jul 28, 2026
Puzzles now adapt to your skill as you play, and every board is verified solvable by pure logic. A full-screen aquarium sits behind the home screen with a 45-fish collection to grow. Refreshed app artwork and icon. A streak view on the home screen. The How-to-Play guide no longer runs down the fishing timer while you read it, and the early difficulty curve is gentler.