River dolphins (or simply botos) live in Amazon region. They are cousins of the sea dolphins. But they are capable of broader head movements. The pink river dolphin (pink boto) is spread on several rivers and they have a behaviour very similar to dolphins, including the interaction with humans.
This package of objects includes several formats, rigging and textures. The objects are high poly. The teeth and tongue were based on real models. There are two Vue formats: .vue (scene) and .vob (Vue object). In the .vob file, the texture and rigging are incorporated. The Blender format includes rigging, materials and textures. And there are the 3 almost universal formats: .dae (also with rigging), .3ds and .obj.
The images you see were rendered some on Blender, some on Vue.