The bluehead sucker spawns in the spring/summer when water temperatures reach > 15 °C. Males join females in gravel/sandy-bottomed streams and copulation begins, taking only a few seconds. In the Grand Canyon tributaries, mating can extend through April, May, and July. This species will not mate unless the water depth is strictly lower than 1 m, probably because the shallow water i. KingdomPhylumClassOrderOverviewThe bluehead sucker (Pantosteus discobolus) is a species of freshwater fish to the intermountain Western US. Formerly placed in the genus Catostomus, it is now placed in the genus. The bluehead sucker is the largest of all Arizona endemic suckers, reaching lengths over 11.8 in. Their colors are very similar to the desert sucker, with dark green or dark silvery top portions and light yellow bottoms. T. Primary records are concentrated at the main stem and the tributaries, as well as the Colorado River drainages at. Blueheads are also found at Snake River above Bluehead suckers prefer larger streams and rivers due to their larger size, but they can be found in a variety of habitats. This species has a wide temperature preference, as well, ranging from cold mountain b.
