A renewed growth of seaweed brings vibrancy to the Sea of Japan in autumn. Withered by the summer heat, seaweed revives as water temperatures drop. Visibility increases, and an undersea garden unfolds in the clear waters. As if they had been waiting for the seaweed to flourish, shoals of sandfish arrive, and over a few short days fill the bay and spawn all at once. Clusters of eggs rock in the branches of the seaweed, creating an otherworldly spectacle.