Elementary textbook of economic zoology and entomology elementarytextbo00kell Year: [c1915] SPONGES, AND SPONGE FISHING 61 best sponges come from the Mediterranean. This region annually produces about $2,000,000 worth of sponges, which is more than half the value of the product of the sponge fisheries of the world. Some sponges come from the Red Sea, others from the Bahama Islands, West Indies, the west coast of Florida and other places. The annual output from the Florida sponge fisheries is valued at between $500,000 and $600,000. The commercial sponges do not live in very deep FIG. 14.—
Elementary textbook of economic zoology and entomology elementarytextbo00kell Year: [c1915] SPONGES, AND SPONGE FISHING 61 best sponges come from the Mediterranean. This region annually produces about $2,000,000 worth of sponges, which is more than half the value of the product of the sponge fisheries of the world. Some sponges come from the Red Sea, others from the Bahama Islands, West Indies, the west coast of Florida and other places. The annual output from the Florida sponge fisheries is valued at between $500,000 and $600,000. The commercial sponges do not live in very deep FIG. 14.—A common bath sponge. (Reduced.) water, being usually found not deeper than 200 feet. In shal- low water they are dragged from the rocks by men in boats who use long poles with hooks on the ends. Those growing in deeper water are dredged up or brought up by divers. Many of the best sponge-fishing grounds have suffered very severely from destructive methods of fishing and efforts are now being made to protect these beds and to stock others. Several methods of sponge culture have been tried, most of
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