Xingu River Ray

 It is also known as the white-blotched river stingray, or polka-dot stingray. It is native to the Xingu River, which is part of the Amazon  River basin in Brazil and prefers rocky bottoms.  It can reach to 75cm (30in) in total length and 20kg (44lb) in weight. https://www.zazzle.com/xingu_river_ray_poster-228819811222199456