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RDub3685 t1_isrc41j wrote

Reply to comment by [deleted] in TIL eels swim from a lake in Australia through stormwater drains and across the ocean to lay eggs in New Caledonia where they die. Their eggs hatch and make the return journey back to the lake they came from. by Aussiewhiskeydiver

Freshwater eels. They're catadromous. Which is the opposite of what salmon do, anadromous. American eels are born in the Sargasso sea in the middle of the Atlantic Ocean and then migrate up rivers and streams to mature. They eventually migrate again to the middle of the ocean to spawn and die.

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