Description This dataset contains underwater pictures collected by several cameras at the OBSEA seafloor observatory. Located 4 km offshore from Vilanova i la Geltrú, Spain (NW Mediterranean), OBSEA is a multiparametric platform that has been continuously acquiring multidisciplinary marine data since 2009. The observatory includes a seabed station and a moored buoy. The dataset contains underwater pictures taken by several underwater cameras at OBSEA seafloor station. This dataset is also available at OBSEA's ERDDAP server. General Information Platforms: OBSEA Expandable Seafloor Observatory Sensors: IPC608UW-10, DCS-7010L, GNC328G2-XD, Sony_SNC-RZ25N, PopUp_Cam, AXIS_P1346 Coordinates: latitude 41.18212 °N, longitude 1.75257 °E, depth 20.0 m Temporal Coverage: from 2021-01-01 to 2021-12-31 Sampling Frequency: variable Files and Formats The data is organized in monthly zip files, containing the original pictures. Inside each zip there is an index with some metadata of the files, including coordinates and field of view (foi column). A NetCDF file with a manifest of pictures is also provided, compliant with the EMSO Metadata Specifications.