The Lacaze-Duthiers canyon’s flanks were mapped using the H-ROV Ariane multibeam echosounder installed with a 45° angle (CALADU-2019 oceanographic cruise). High-resolution bathymetric data collected on the canyon’s flanks made it possible to highlight a series of sub-parallel structures identified as lithified sedimentary strata along which coral colonies grow.

General map is from EMODnet Bathymetry: https://www.emodnet-bathymetry.eu/