The database contains a long time-series (starting in the late 1970s) of under-water photographs showing the composition of rocky-bottom communities at ca. 5 to 30 m at marked sampling stations (sites) at Kvadehuken. Photographs were taken by divers, usually at ca. yearly intervals at each site. The project was initiated by Prof. Bjørn Gulliksen, and he was responsible for project organization and took many of the photographs over the initial 30 years or so.