Primary criterion D1C6 (i.e. The condition of the habitat type, including its biotic and abiotic structure and its functions, is not adversely affected due to anthropogenic pressures) was also not assessed with regard to pelagic broad habitat types. This was due to limited knowledge and understanding of the correct and robust scientific basis and methodologies by which pelagic habitats could be reliably assessed. Instead habitat-linked assessments carried out under Descriptor 4 – Elements of the marine food webs, Descriptor 5 – Human-induced eutrophication and Descriptor 6 – Sea-floor integrity and other Descriptors (e.g. Properties and quantities of marine litter, Introduction of energy) went a considerable way to inform the assessment of environmental status and condition of habitats in Ireland’s marine area.