Scientists Figured Out How Eels Reproduce (2022) (intelligentliving.co)

The article says researchers have for the first time tracked European eels to their Atlantic spawning grounds in the Sargasso Sea, confirming a long-suspected stage of their reproduction cycle. Using satellite tags on female eels, the team followed their months-long migration and collected data on timing, speed, and likely depth changes as the eels mature. The piece also notes major conservation pressures on European eels, including migration barriers, habitat loss, and illegal glass eel trade.