These fish are found in Colorado and other areas in Western North America. Razorback Suckers can grow to about 3-1/2' (1m) and can weigh up to 14lbs (6kg). They are often brownish black with a yellowish color on their underbellies. These Suckers can live quite a long time, over 40 years is not too uncommon. Unfortunately, habitat destruction, introduction of new species and the rerouting of waterways has pushed this fish to the brink of extinction.
One amazing fact about the Razorback Sucker is their "third eye". Portions of this fish's retina is very receptive to UV rays. Normally this fish is too deep for these rays to penetrate, but when the Razorback Sucker is in the shallow spawning they use this portion of their retina to flash reflected sunlight and warn other males to stay away. They do this by rolling their eyes downward revealing this strange "third eye".
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