sources
dauphin
http://pixabay.com/static/uploads/photo/2013/11/01/11/13/dolphin-
http://pixabay.com/static/uploads/photo/2014/07/31/20/31/bottlenose-dolphin-406757_640.jpg
http://pixabay.com/static/uploads/photo/2013/11/01/11/13/dolphin-203875_640.jpg
http://pixabay.com/static/uploads/photo/2015/01/12/18/17/dolphin-597527_640.jpg
http://upload.wikimedia.org/wikipedia/commons/1/10/Tursiops_truncatus_01.jpg
orque
https://farm4.staticflickr.com/3285/4051307158_73e5461297_o.jpg
https://farm2.staticflickr.com/1268/1317058420_e3e0d8f726_o.jpg
https://farm3.staticflickr.com/2629/4051307390_85fe52841c_o.jpg
http://pixabay.com/static/uploads/photo/2014/02/05/03/48/orcas-258745_640.jpg
http://pixabay.com/static/uploads/photo/2014/01/13/20/11/whale-243920_640.jpg
