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by veidelis 345 days ago
What I've had heard so far about cod's troubles in the Baltic sea is that it's not salty enough for them. For cod to reproduce, their eggs need a certain salinity so that they swim to the right depth after they are spawned.

Here's an article in Latvian news site about it - https://nra.lv/neatkariga/intervijas/481931-mencu-zveja-balt...