Koi Fish Pond - Idle Merge Game

Merge colorful koi fish to evolve your pond’s ecosystem by strategically combining species and balancing growth. Players manage space and upgrades to expand their aquatic habitat while unlocking higher-tier fish with unique traits through incremental merging. The objective centers on creating a thriving, diverse pond environment by optimizing fish combinations and resource flow. Key Features • incremental merge evolution system • spatial pond management controls • tiered fish unlocking progression • resource balancing mechanics • aquatic ecosystem theme integration