The ocean is too deep, too many secrets untold yet tends to look calm from the surface.
The land is too exposed, too willing to take all the wrongdoings and harm from human.
When these two harsh worlds meet, would it change the way the merfolk and human live? Could they live in unison with veneration on eachother? Would they be able to accept eachother's differences?
In the end, the decision would still be in their hands.
It depends if they'll dive into the ocean or walk into the path.