This dataset contains video data and snapshots acquired with the camera SMOOVE installed on the TEMPO ecological module, deployed on the EMSO-Azores observatory from July 2017 to August 2018. Data consist in : - 342 daily zoomed-in and 35 10-day snapshots (Size of snapshots: 480 x 360 pixels). - 185 8-minutes of zoomed-in (daily) and zoomed-out (every 10 days) video sequences (Size of video sequences: 1920 x 1080 pixels). The module is connected to the SEAMON East environmental monitoring node and films a mussel bed located at the base of the active Tour Eiffel edifice at 1695 m depth.  Position : lat N 37 17.330 long W 032 16.534