Fig. 2. Video analyses of Rimicaris exoculata behavior during in vivo experiments. Behavior during 30 s sequences, as a function of time since re-pressurization: , `motionless'; +, `moving'; , `active walking or swimming'; •, `spasms' (see Materials and methods). (A,B) Behavior (lower graphs) related to temperature (upper graphs, mean temperature between t1 and t2 probes; see Fig. 1A) during two heat-exposure experiments [Expts 3 (A) and 4 (B); 15 individuals per experiment, split into three groups of five individuals]. For each observation time, the maximal error regarding the corresponding temperature is approximately ±2°C (A) and ±1.7°C (B).