National Geographic : 1934 Jun
Photograph by Capt. Frank Hurley CONSIDER THE INFINITE POLYPS OF THE SEA AND HOW THEY BUILD THIS VAST EXPANSE OF LIVING CORAL Clusters of colorful colonies stand revealed by the retreating tide along the shore of Darnley Island, near Australia. Soft shades prevail-rose, golden brown, purple, emerald green. Some delicate pink corals break at a touch, but there are others that could scarcely be chippedbyahammer. With high, stout boots, naturalists explore the reef and its pools, but he who wanders too far must race the rising tide back to the beach.