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15. the day, the highest temperature that I recorded in any of the springs was 89°F. Besides supporting an extensive agriculture of dates, rice, figs, limes, and other crops, the waters have a life of their own. Two kinds of fish, turtles, frogs, many aquatic insects, snails, leeches and lush aquatic plants including rooted pond weeds and several kinds of algae. The fish are the small killyfish [[underlined]]Aphanius dispar[[/underlined]] (which is common among the coastal areas of Arabia in both fresh and salt water) and a fresh water mullet which does not exceed 5 inches in length. The killyfish are interesting because of the considerable variation of size,shape and color among individuals, which is not true of the species in salt water. The mullets have a tan color pattern above with three diffuse lengthwise strips and white silver below. They fin rays of many of these mullets examined are crooked, but the fish were healthy and normal in all other respects. Both species of fishes are dried and salted to some extent for Arab food, and the need for the introduction of a fish that will grow to a larger size is apparent. Because of the success of carp culture in Palestine and other countries, the carp [[underlined]]Cyprinus carpio[[/underlined]] may prove to be a valuable introduction at Hofuf. In the event that pond culture would not be attempted at the present time, the introduction of a large cichlid, such as [[underlined]]Tilapia gallilea[[/underlined, to establish itself in the wild state might be a [[strikethrough]]good[[/strikethrough]]^[[better]] idea. The frogs grow as large as three inches from head to tail, but they are not eaten by the Arabs because of religious prejudice. With over 2000 Americans working in Arabia a market for fresh frog legs could be developed, and possibly the American bullfrog might live in these waters. The turtles are a small type of painted or pond turtle, and they are another indication of the presence of protein food in the water.