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cittatva t1_j592hb5 wrote

Reply to comment by RazorRuss in Dolphins swim in Bronx River – “This is great news — it shows that the decades-long effort to restore the river as a healthy habitat is working." by elbaekk

Or the oceans have become relatively dirtier.

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DarthBluntSaber t1_j5a6hbf wrote

Yeah this is my thought as well. The ocean has just become dirty enough that it there isn't a difference to them

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