The Fish That Builds Sandcastles to Impress a Mate
Imagine diving beneath the turquoise waves off a remote Japanese island, sunlight flickering down to the sandy bottom. Suddenly, you see something bizarre: a perfect, intricate “sandcastle”—a circular masterpiece decorated with ridges, valleys, and geometric patterns more precise than any child’s beach creation. But this isn’t the work of a human. It’s the love labor ...











