A beautiful coin struck from 2 ounces of pure silver, dedicated to coral reefs.  The high relief depicts the marine fauna in minute detail. Thanks to the addition of resin, the underwater perspective gains depth and the saturated colours make the underwater life look extremely realistic. The coin comes in a themed box along with a certificate of authenticity.  A coral reef is an accumulation of skeletons of reef-forming organisms. Coral reefs are formed in seas and oceans where the water temperature remains above 18 °C and the depth reaches 50 m. Reefs represent some of the most vulnerable ecosystems to climate change. Climate models indicate that by 2050, reefs will be under temperature stress every year causing fading. The largest coral reef is the Great Barrier Reef, located off the east coast of Australia.