Laser line scan image of a large group of fish congregating around an isolated rock outcrop. The investigators speculate that these fishes are young widow rockfish and bocaccio, based on their ROV observations in the vicinity. The rock has white sea anemones (Metridium giganteum)on it, and is surrounded by soft sediment (light grey with ripples). The dark region surrounding the outcrop is an artifact resulting from a rapid increase in the FOCUS vehicles altitude as it passed over the rock outcrop. The site is in about 60 meters water depth inside the Big Creek Ecological Reserve. Swath width (side to side of image) is about 7.5 meters; rock outcrop is about 3.7 meters high. Image courtesy of Laser Line Scan Mapping, NOAA-OER.