Your fish have hunger and health. The tank has water quality. You keep things healthy by feeding (drop food) and cleaning (costs coins). Coins appear in the tank — tap or slide over them to collect. You earn XP from feeding, cleaning, and collecting; level up to unlock new fish and upgrades in Shop. Pan and zoom to look around; tap a fish to select it.

Use these keys while the game has focus:

• F Feed · C Clean · S Shop · N Shop (Nursery tab) · E Encyclopedia · Space Pause

Keep your fish happy and your tank clean.

• F or Feed — drop food. Fish need to eat or their hunger and health drop. You can enable autofeed in Shop so food drops automatically.
• C or Clean — clean the tank (costs coins). Low water quality hurts fish.
• Click a fish to select it and see its stats. Tap or slide over coins on the tank to collect them.
• Scroll or pinch to zoom; drag empty area to pan.

Earn coins and XP to unlock more.

• Tap or slide over coins to collect them.
• Coinfish — Buy this upgrade in Shop to add a fish that automatically collects coins from the tank for you.
• Gain XP from feeding, cleaning, and collecting coins. Level up to unlock new eggs and upgrades.

S or Shop button.

• More fish to unlock — Level up to unlock new species. Buy eggs to hatch new fish; higher rarity = rarer species.
• Autofeed — Upgrade so food drops automatically; you don’t have to tap Feed.
• Coinfish — Upgrade that adds a fish that collects coins from the tank for you.
• Filter feeders — Fish like scallops that feed by filtering the water; they help keep the tank clean.
• Other upgrades: filter (water quality), better food, nursery, and tank size.

Open Shop and switch to the Nursery tab. N opens Shop on the Nursery tab. Unlock in Shop first.

• Choose two adult fish from the dropdowns as parents. Start breeding to get an egg after a short wait.
• Bred eggs can give new species you haven’t discovered yet.

• Save often (Menu → Save now). Sign in to save progress to the cloud.
• On mobile: enable Shake to feed in Menu → Settings and adjust pellets per shake.
• Use the Encyclopedia (E) to see discovered species.