Benthic macrofauna and sediment particle size data from 1969 to the present from multiple sources stored on the OneBenthic database dataset https://portal.medin.org.uk/portal/start.php?tpc=009_CEFAS3673e50d-9960-4b55-9fb7-8255763d4bf5 The OneBenthic initiative brings together disparate benthic datasets (i.e. seabed macrofauna and sediment particle size) in one cloud-based PostgreSQL platform. The resulting high-quality, standardised dataset is used to generate new science, and new innovative and collaborative ways of working. Outputs are shared via open-access publications and a suite of interactive web apps (https://openscience.cefas.co.uk/). For further details of the initiative click here: `https://sway.office.com/HM5VkWvBoZ86atYP?ref=Link`_. This metadata record relates to the entire dataset, rather than its individual components and covers a timespan from 1969 to the present. .. _`https://sway.office.com/hm5vkwvboz86atyp?ref=link`: https://sway.office.com/HM5VkWvBoZ86atYP?ref=Link 20210728 20210715