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The original was posted on /r/biology by /u/bajajoaquin on 2024-10-18 18:49:51+00:00.

I saw a headline that salmon have returned to the Klamath River for the first time in a century. While that’s fantastic news, I wonder how they got there.

Isn’t there a big deal made of how salmon return to spawn in the same rivers and streams they hatched in? How were there any salmon that remembered the Klamath? Presumably not all salmon go back to their spawning grounds as is usually stated, so how many wander off to other streams and rivers?