Artificial fish reef

soft corals, sea fans, feather stars…. a lot of invertebrates. -18m, 16.9℃
soft corals, sea fans, feather stars…. a lot of invertebrates. -18m, 16.9℃
Inside an artificial reef: The stacked concrete blocks covered with colorful soft coral. It looks like a cave.
It built only about 20 years ago. The power of the ocean is excellent. Anything humanmade is reforming easy and makes returning to nature. at Hasama, Chiba, Japan