Ocean Drift Fish

Submarine Fishing Challenge** is a relaxing deep-sea fishing collection game. Pilot your submarine into the mysterious underwater world, use your fishing net to catch all kinds of奇特 marine creatures, earn coins to upgrade, and unlock more ocean zones!

### Core Gameplay

1. Consume Energy, Dive and Fish
- Each dive costs 2 Energy points. Tap the "Start" button to dive automatically
- While diving, touch and drag the screen to move your submarine left and right
- Avoid obstacles and touch the fish with your net to catch them

2. Collect Fish, Auto-Sell
- Caught fish are temporarily stored in the collection bar
- Upon reaching maximum depth, the submarine automatically rises to the surface
- After surfacing, all caught fish are automatically sold for gold coins

3. Earn Coins, Upgrade and Grow
- Coins can be used to upgrade diving depth, allowing you to explore deeper waters
- Can also be used to unlock new maps and discover more fish species
- Upgrade offline earnings to keep making money even when you're away

### Maps & Fish

- The game features 4 maps, each representing a different ocean zone
- Each map has 10 unique fish species, totaling 40 collectible fish
- A "New Species Discovered" prompt appears when you catch a fish for the first time
- Each fish has a normal version and a special skin version (unlocked via ad watch), with the skin version being more valuable

### Energy System

- Initial max energy: 80 points
- Energy auto-recovers: 2 points every 5 minutes
- Energy also recovers while offline
- Watch ads to get extra energy when you're low

### Offline Earnings

- Your fishery keeps working while you're offline
- Base output: 85 coins/minute, upgradable by raising the offline earnings level
- Offline earnings accumulate for up to 2 hours
- Claim all accumulated earnings in one go when you return

### Collection Handbook

- View all discovered fish in the handbook interface
- Each fish comes with an interesting description
- Discovered and undiscovered fish are clearly displayed — collecting them all is a major game goal

### Tips

- Hitting walls while diving increases your current diving level, helping you encounter more valuable fish
- Manage your coins wisely: prioritize diving depth upgrades or new map unlocks based on your strategy
- Follow the game account to earn bonus coins