The Oceans Daylight Zone Titanium Representing the layers that the light penetrates the water. From the daylight zones, the surface, to the twilight zone, the bit in the middle and down to the darkest depths of the midnight zones where no light reaches at all. Each coin represents the fish that are found at each level. All uncirculated titanium, measuring 36 mm and weighing 10 grams. Boxed and certificated.