Gyotaku is the traditional Japanese method of printing fish, a practice which dates back to the mid-1800s. This form of printing was used by fishermen to record their catches, but has also become an art form of its own. Prints are traditionally made using sumi ink and washi paper.
To make her piece in glass, Jennifer inked a real fish and printed onto rice paper. She then transferred the image onto glass using a special metal ink and fired it in her kiln. The sepia toned areas are from the metal ink.  Then she added colored glass to decorate it, and re-fired the fish. Finally, it was fired onto a background sheet of white glass because most Gyotaku prints are printed on a solid background.