They represent 90% of all animals on the ocean floor. The hadal zone spans from depths of to the ocean floor. It invented and manufactured multibeam sonars used in ocean floor mapping. Those living on the surface of the ocean floor are known as epifauna. Photographs were released showing it broken into several pieces on the ocean floor. Submarine volcanoes are common features of the ocean floor. Bathymetry is the mapping and study of the topography of the ocean floor. Some like the detrivores rely on organic material falling to the ocean floor. Debris was scattered across the ocean floor. By count they represent 90% of all animals on the ocean floor. Siliceous ooze is a type of biogenic pelagic sediment located on the deep ocean floor. Later, they began working together to map the topography of the ocean floor. They are typically found at the bottom of the ocean floor. Flood basalts on the ocean floor produce oceanic plateaus. Flatfish are an order of ray-finned benthic fishes which lie flat on the ocean floor.