Glass eel fishing is done in Tokushima Prefecture in Japan in winter. hunters illuminate underwater with a mercury lamp from onboard, and scoop up the fry of the eel gathering in light with a small net. A lot of lights ask for glass eel, and wander about a brackish-water region the night of low moon. Each ship differs in the color of light, the size of a ship, the form of a ship, or equipment. For me, it seemed that various species of fireflies flew. I thought that I would like to photograph these.Like pictorial book.