Mosaic of the Twin Peaks hydrothermal cluster, which includes two ~8m tall sulfide structures called the Climber (left) and Flying Buttress (right). These comprise the most actively venting portion of the cluster. Smaller extinct sulfide chimneys surround the active structures, with localized areas of diffuse flow emanating from the sulfide talus at the base of the chimneys. This mosaic includes 17 images collected on Jason dive 231 during the 1997 Edifice Rex cruise. Photo mosaic created by Mitchell Elend, University of Washington. 1997 Photomosaic Photograph:Mosaic Camera:Digital JdF:Endeavour:Mothra:TwinPeaks Deborah Kelley