Within the OSTST SABIO project, in situ data obtained from CTD (Conductivity, Temperature and Depth) sensors attached on 6 elephant seals (Mirounga Leonina) during the period between the 17th and 31st of October 2019 are analyzed . First, data quality is assessed through the comparison with Satellite Sea Surface Temperature Multi-scale Ultra-high Resolution (SST MUR). The sub-surface (15 m depth) in situ data collected correlates very well (r=0.9) with the SST-MUR, suggesting that the in...