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<br />FACT SHEET <br />Razorback sucker (Xyrauchen texanus) <br /> <br />Status: <br /> <br />Proposed for listing as endangered under federal law in 1990. <br />Endangered under Colorado law since 1979. <br />Listed as "protected" in Utah law since 1973.. <br /> <br />Description: <br /> <br />One of the largest suckers in NonIt America, the razorback sucker can grow to more than I3 pounds and lengths <br />exceeding 3 feeL The razorback is brownish-green with a yellow to white-colored belly and has an abrupt, bony, <br />keel-edged hump on its back just behind the head. Razorback suckers have been known to live 20 years or more. <br />This fish is thought to have evolved more than 4 million years ago. <br /> <br />Distribution: <br /> <br />The razorback sucker was once widespread throughout most of the Colorado River Basin from Wyoming to <br />Mexico. In the upper Colorado River Basin, they are now found only in the upper Green River in. Utah, the lower <br />. Yampa River in Colorado and occasionally in the Colorado River near Grand Junction. Small populations also exist <br />in the Dirty Devil, San Juan and Colorado River "anns" of Lake Powell. In the lower Colorado River Basin, <br />razorback suckers have been found oili y in Lake Mohave. . <br /> <br />Spawning: <br /> <br />These fish can spawn as early as age 3 or4, when they are 14 or more inches long. Depending on the water <br />temperature, spawning can take place as early as November or as late as June. . <br />