Movie 2

Examples of the three different head movements which were classified. First clip: straight down movement. A harbour seal approaches the active nozzle from the left, the breathing current is directed against its swimming direction, to the left (note the orientation of the nozzle below the mesh-grid). The seal moves straight toward the nozzle. Second clip: U-turn. A harbour seal approaches the active nozzle from the left, the breathing current is directed to the right. The seal passes the nozzle, then turns around. Third clip: correction. The harbour seal performs a U-turn, but suboptimally, and corrects its position to station at the nozzle.

Hydrodynamic detection and localization of artificial flatfish breathing currents by harbour seals (Phoca vitulina)

Benedikt Niesterok, Yvonne Krüger, Sven Wieskotten, Guido Dehnhardt, and Wolf Hanke

Journal of Experimental Biology 2017. 220:174-185; doi: 10.1242/jeb.148676