Macrofaunal community data.

The raw data used for the statistical analyses and data visualization of the macrofaunal communities (> 300 μm) observed on the experimental substrates (wood, carbonate rock, sedimentary rock, phosphorite rock, ferromanganese rock; collected in 2021) and natural substrates (sedimentary rock, ferromanganese rock, basalt; collected in 2020 and 2021) at both deep (~1100 m) and shallow (~700 m) deployments at San Juan Seamount and 40-Mile Bank in the Southern California Borderland. (XLSX)