The seabed in the southern area is relatively high, mostly shallow freshwater, and is covered with colorful coral reefs that make it extremely beautiful. However, only the shallow-sea mermaids, who can navigate by singing, can freely move between the coral reefs and reefs.
The western area has a moderate topography, with moderate sea temperatures and seabed conditions. There are scattered corals, reefs, and small islands dotting the sea. Any mermaid can survive here, but only the witch priest mermaids, who have equally moderate requirements for the environment, find this place comfortable.
The central sea area is vast and flat. Even the occasional trenches and canyons are quite spacious and open. Only here can the enormous mountain mermaids feel relaxed and at ease. The crystal mermaids have lived with the mountain mermaids since ancient times. They have no requirements for the environment and basically live wherever the mountain mermaids live.
Mermaids are highly adaptable, but they are only comfortable living in environments that are more suitable for them. It is rare to see mermaids from other areas come to their area. Even if they do come, it is only for sightseeing or making friends.
Now, the migration of various mermaid races has disrupted the mermaids' usual habits. Except for the cubs who are unable to leave their own areas, the other mermaids have all moved to other areas.
In every city, you can see the presence of any kind of mermaid, and even some mermaids that were thought to have disappeared into the annals of history can be seen sporadically.
This migration was the result of the combined efforts of the seven mermaid kings.
This migration also made the mermaids feel the approaching storm.
Throughout history, every such migration has been followed by a major battle concerning the life and death of the mermaids.
Each mermaid experiences a kind of enlightenment in the darkness.
War may break out very soon.
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