This paper provides a global map to identify potential and likely marine and coastal Critical Habitat, as defined by 'International Finance Corporation Performance Standard 6'. Eleven biodiversity features are identified which can be used as an early screening aid by industries and following mitigation strategies. The approach used involved assessing global marine and coastal biodiversity and ecological datasets against PS6 criteria for Critical Habitat, and using these assessments to build a global layer intended to inform environmental specialists and help guide site-level biodiversity assessments.