Play

Play with koi pond ideas

Design a pond, make seasonal choices, and see how your plan changes through a year.

Pondsmith: Tomorrow Mode

Choose a starter pond, plan for growing koi, and run a year through spring, summer, autumn, and winter. Earn Pond XP in Career mode or experiment freely in Free Build.

Play Pondsmith

An illustrative planning game, not a prediction of real pond conditions.

Koi Variety Quiz

Test your eye for koi colors, patterns, and scales. Try eight questions, learn from the explanations, and practice the ones you missed.

Take the Koi Quiz

Save a real pond plan and compare calculator results in one place.

Planning a real pond? Use the pond calculators alongside the game.

Take a little pond break. Choose a game and grow your calm.

IDLE GAME · KOI COLLECTING

Kohaku Haven

Build a peaceful pond, breed rare koi, and discover the power of Dragon Scales. Your haven keeps growing while you’re away.

  • 36 koi to collect
  • Upgrades & rebirth
  • Saved in your browser
Play Kohaku Haven

Koi Felony: Glazed & Confused

One koi. One stolen doughnut. One increasingly enormous raccoon. Swim smoothly, dodge the net, and see how long you can keep breakfast.

Play Koi Felony

A free 3D survival game. Arrow keys, WASD, or touch controls. Share your high score.