Ocean Ecology was contracted to undertake a benthic characterisation survey for the proposed Arven Offshore Wind Farm off the east coast of Shetland. The scope included seabed imagery collection, sediment sampling for physico-chemical and macrobenthic analysis, and water eDNA sampling to establish environmental baseline conditions. The outputs were intended to support EIA and Habitats Regulations Appraisal consent processes and provide baseline data for future monitoring.