Blind River Dolphin: First Side-Swimming Cetacean

@article{Herald1969BlindRD,
  title={Blind River Dolphin: First Side-Swimming Cetacean},
  author={Earl Stannard Herald and Robert L. Brownell and Frederic L. Frye and Eula Morris and William E. Evans and Ashley Scott},
  journal={Science},
  year={1969},
  volume={166},
  pages={1408 - 1410}
}
The blind river dolphin (Platanista gangetica), first written about by Pliny the Elder in A.D. 72, was found (10 November 1968) to be the first known side-swimming cetacean. The rudimentary eye lacks the lens, but anatomical evidence suggests that the eye may serve as a light sensor. The underwater sound emissions of this species, although similar to those of the Amazon River dolphin (Inia geoffrensis), appear to be produced constantly. 
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