Following each species will be a brief description of the fish and where it can be located. Then the evolution and ending with current species that are endangered or threatened. The common characteristics of suckers are cycloid scales, soft-rayed fins and abdominal pelvic fins. The pectoral fins are rounded, broad and ventral in position, common of bottom fishes. The species usually has a high protrusible mouth with fleshy lips on the ventral side of the head.
Most suckers are bottom feeders which can be seen in there body shape.
They use there large ventral mouth and thick fleshy lips to scrap algae and other food off rocks and gravel. Suckers are benthic spawners which means they lay their eggs in gravel or on rocks. They have a streamlined body form, which belongs to the genres Catostomus and Mozostoma. Suckers are an introduced non-native species to this area. They lack barbels and an adipose fin.