Small-scale thermal responses of hydrothermal vent polynoid polychaetes: Preliminary in situ experiments and methodological development

► Use of a camera-temperature logger array to study small scale thermoregulation. ► Hidden Markov model used to predict behavioural states based on movement patterns. ► Hydrothermal vent polynoids exhibited a thermoconforming strategy. ► Recommendation postulated for future camera deployments.