http://www.jaredturner.org/amazon-river-dolphins/ learning interesting stuff everyday... Thu, 04 Dec 2008 08:09:39 +0000 http://wordpress.org/?v=2.6.5 http://www.jaredturner.org/amazon-river-dolphins/#comment-182 James Tue, 10 Jun 2008 21:20:08 +0000 http://www.jaredturner.org/?p=217#comment-182 I read river dolphins are also visually impaired too. Almost to the point of blindness, where they rely on sonar a lot more for navigation. Probably evolution due to river water being murky more often than ocean water. =-) I read river dolphins are also visually impaired too. Almost to the point of blindness, where they rely on sonar a lot more for navigation. Probably evolution due to river water being murky more often than ocean water.
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