This beautiful image is a colored intricate lithograph titled "Shad."  It was drawn by Denton in 1896.  It measures 12" x 9 1/2".  It is matted, and has some spot damage on the print.

S.F. Denton was an artist of chromolithographs.  He was well-known for documenting various species of fish.  He worked from the 1890s to the early 1900s.