Short Wave Short Wave

Prepare to be baffled by what we don't know about eels

Jun 5, 2026 · 13m

Summary

NPR’s Shortwave explores the enduring mystery of European eel reproduction with fish physiologist Arjan Paulstra. While scientists know eels spawn in the Sargasso Sea, the exact location and act remain elusive due to the vast, deep ocean environment. Solving this puzzle is crucial for understanding population declines and enabling captive breeding to reduce wild fishing pressure.

Topics discussed

Intro: Tiny Desk Tour and the mystery of eel origins Sponsors: NetSuite and Edward Jones Why European eel spawning grounds remain elusive The complex life cycle and sexual dimorphism of eels Population decline and challenges in aquaculture Current research efforts and hypotheses in the Sargasso Sea Lab reproduction goals and decoupling from wild stocks Conservation benefits and the 'Peter Pan' eel phenomenon Outro, credits, and NPR support messages
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