This painting is an original handpainting depicting carps and turtles swimming underwater by Katsushika Hokusai (1760-1849).  Water plants have colors, but most of the objects are drawn with shades of ink like an ink painting.

It is characterized by the unique expression for the faces and the scales regularly drawn. That represents Hokusai’s worldview rather than depicting the actual carp.

On the left side of the screen, it is written that his seal of “亀毛蛇足” was given to the disciple Hokumei. The seal was what he liked to use in his works, and these letters are based on Buddhist terminology, “亀毛兎角”.