The ocean is losing oxygen, with effects across food webs. Dr. Sven Pallacks explains ocean deoxygenation, how oxygen enters and moves through seawater, and why oxygen minimum zones develop. The episode connects warming, circulation, dead zones, and marine life, then uses fish ear stones called otoliths to examine past declines in mesopelagic fish. A clear introduction to an invisible change reshaping ocean ecosystems..

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Special thanks to the Monterey Bay Aquarium for sponsoring this episode.

Episode Guests: Dr. Sven Pallacks

Find Dr. Pallacks’ publications on Google Scholar

Read Dr. Pallacks’ article,  Ocean deoxygenation linked to ancient mesopelagic fish decline. 

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