This data set is linked to a study that sought to investigate whether a mid-duration exposure (92-days) to warming and/or acidification alters the response to visual or mechano-acoustic predator cues in the European sea bass Dicentrarchus labrax. Juveniles, aged between 283 to 316 days post hatching, were challenged in separate behavioural trials to assess their reaction facing either an overflying bird shadow (visual cue) or a bird swoop attack (mechano-acoustic cue).

Abbreviations for the kinematic behavioural variables evaluated during the behavioural tests are available in the 1^th tab.

To follow the best practices of ocean acidification, the 2^st and 3^nd tabs show daily measurements of temperature and pH (in NIST scale). The 4^rd tab shows weekly measurements of salinity, oxygen, total alkalinity, temperature and pH (in NIST and total scale) that were used to calculate the carbonate system parameters.

Total body length (measured from the nose tip to end of caudal fin) was measured upon arrival in a sample of 74 individuals (5^th tab) or in 165 individuals after the visual tests (6^th tab) and in 201 individuals after the mechano-acoustic tests (7^th tab). Data sets used to run the linear mixed-effects models for the visual tests or for the mechano-acoustic tests are shown in the 6^th and 7^th tabs, respectively.