Merge Fish vs. Plants Battle

Welcome to the underwater world!

Recently, the sea area has become unstable, and schools of fish have begun to argue about who has the right to reproduce in this area. In the past, this was not a big problem and could coexist peacefully. But the intervention of external forces has made this matter no longer so simple.
How to play the game
You can merge the same fish to make them stronger. By competing for shells to gain more support from fish schools, obtain the right to reproduce in this sea area!