Blue Sucker (Cycleptus elongatus)

Description: 

The Blue Sucker is widespread in the Mississippi River Basin from Montana and Pennsylvania downstream to Louisiana and Mississippi, and in other Gulf Coast drainages from Louisiana to northern Mexico. The Blue Sucker is primarily found in the mainstem of large rivers. In the spring breeding season males darken to a blue color, and their head and body are covered with small, white breeding tubercles. Their long and highly curved dorsal fin is adapted for life in swift currents.