I Raised Mythic Sea Beasts in My Fish Tank

One day, an ordinary fish tank becomes home to a race of miniature fishfolk.
Soon afterward, its owner learns that the game captivating the world is destined to merge with reality. When that happens, monsters and civilizations from another realm will cross over—and ordinary people may have nowhere left to hide.
His only advantage is a god-tier talent that transforms his fish tank into an evolving pocket world. Sea beast eggs, rare creatures, and precious resources obtained inside the game can all be brought into it. With time flowing far faster within the tank, even the weakest hatchling can grow into a creature of legend.
By the time the game descends upon reality, the balance of the entire world has already begun to change. Colossal sea beasts rise from a seemingly ordinary tank, ancient powers lose control of the oceans, and distant kingdoms arrive at an astonishing conclusion:
They have discovered the legendary origin world of all sea beasts.