This survey, led by the Marine Institute, took place on board the RV Celtic Voyager in January"February 2020 to carry out an environmental survey of coastal and shelf waters from Dun Laoghaire (Dublin) to Galway for the purpose of Benthos monitoring. 139 Benthic Faunal samples and 140 particle size analysis (PSA) samples were collected from nine waterbodies using a 1m2 Day grab. All faunal samples were sieved on a 1mm mesh sieve. These samples were collected as part of the Benthic maco-invertebrate ecological quality element of the Water Framework Directive. Benthic macro-invertebrates monitoring in transitional and coastal waters under the Water Framework Directive (WFD) in association with the Environmental Protection Agency.