The proposed Level 2 units approximating the Realms of Spalding et al. (2007), showing also the boundaries of coastal Level 4 units. The coastal Level 2 units are adjusted to the nearest Level 4 unit and to a 200 NM seaward boundary.

  
  Part of: Bailly N, Gofas S, Lonneville B (2025) A worldwide geographical scheme for recording the distribution of marine biota: proposal and call for feedback. Biodiversity Data Journal 13: e157371. https://doi.org/10.3897/BDJ.13.e157371