The terrestrial coast:

The Terrestrial coast is an area of the shoreline seemingly believed by those who inhabit it to be blessed by the moon itself. Locals hold many moon festivals to honor the blessing and as a way to thank the planet for a home, to others there's nothing special about this region to the naked eye but to those who've lived amongst the blessed coast their home is much more. 

During the day there's a faint shimmer amongst the sand but the magic really happens once the sun sets, the beach and ocean have a glowing sparkle unlike any other. Inside the ShellStar cave the walls and ceiling are like constellations made up entirely of sea crystals decorating the home of the Knightibranch that inhabit the cave.

The tide pools of the Terrestrial coast don't behave like water in any other part of the world. Here, the shoreline is a series of interlocking crystal basins, carved deep into the limestone by centuries of rhythmic erosion. When the moon hits the zenith, the liquid in these basins doesn't just reflect the sky; it amplifies it, turning the shallow pools into shimmering, inverted telescopes that seem to pull the distant constellations down toward the surface of the earth.