Yet, most of orcas’ lives occur underwater and therefore out-of-sight ... Norwegian Orca Survey (Andenes, Norway). We worked together over several winter seasons to deploy innovative camera ...

This summer, she's listening to the orcas of Norway's Lofoten Islands ... then turn off the engine to minimize noise. They use an underwater microphone called a hydrophone to record vocalizations.

Orcas make similar tail strikes underwater—death knells for herring, said Tiu Similä, a cetacean biologist who helped pioneer the study of orcas in Norway and is an expert on an orca hunting ...