Recently, the deep sea has become unstable, and fish populations have begun to debate who has the right to breed in the area. In the past, this was not a big issue and could coexist peacefully. But the intervention of external forces has made this matter no longer so simple. You can merge the same fish to make them stronger. In addition, by competing for more shells, we can gain more from fish schools. Let's fight together for the right to reproduce in deep sea areas!