This dataset contains temperature data acquired between September 2020 and June 2021 with thermocrons® i-buttons® installed along chains in the field of view of the SMOOVE camera connected the SeaMoN East frame. Data was acquired every hour. The array is not connected to an energy node. They are associated with the SMOOVE camera which is part of the SeaMoN East ecological monitoring node. An image showing the location of each button upon deployment is provided, but note that the buttons move over the year and did not remain in the same position.  Each button acquired 6 508 measurements. Location : Latitude N 37°17.325; longitude W 032°16.537; 1699 m depth