Megafaunal variation in the abyssal landscape of the Clarion Clipperton Zone.

•Seafloor geomorphology was important in the structuring of abyssal megafauna.•Differences in megafaunal community ecology were found between all landscape types.•Lower megafauna density & diversity in a bathymetric valley than flat and ridge areas.•Large samples, collected by AUV, were required to make robust ecological conclusions.