# Evaluating EBSAs and PSSAs

Spatial Distribution of EBSAs
Figure 1 shows the boundaries of the EBSAs defined by the Convention on Biological Diversity. With such large overarching criteria, it is clear that their spatial extent and number are significant. EBSAs number in excess of 290 worldwide, accounting for some 2.2 x $$10^{13}$$ $$km^2$$of ocean and coastal waters.
Global distribution of EBSAs
Spatial distribution of PSSAs
Figure 2 shows the spatial extent for the 13 PSSAs presently agreed by the IMO. Boundaries for three (check) further putative PSSAs have not been included, due t lack of accurate geo-referenced data. These areas are significantly less in number and extent, accounting for some 5.3.x ﻿106 ﻿km2 of ocean and coastal waters.

Global distribution of PSSAs