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Northern elephant seals use deep-sea research sonar as dinner bell
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NEWS RELEASE Northern elephant seals were repeatedly captured on camera in the deep Pacific Ocean using sonar from an Ocean Networks Canada (ONC) observatory as a dinner bell to forage for their next fish feast, according to a new study by a University of Victoria visiting scientist. The research study published in the peer-reviewed [*PLOS ONE*](https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0308461) journal provides a unique first-ever visual glimpse into the elusive mammal’s deep sea underwater behaviours, with a focus on their sophisticated feeding strategies, prey preferences as well as resting habits. Altogether, at least eight male elephant seals, ages four to seven, were observed on camera and detected by hydrophones during multiple visits to the 645-metre-deep research site at Barkley Canyon along [ONC’s subsea cabled observatory](https://www.oceannetworks.ca/observatories/) NEPTUNE off the British Columbia west coast between 2022 and 2023.
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