The heart-breaking moment a mother dolphin refuses to release her stillborn calf has been captured on camera. The maternal dolphin, whose name is Cracker, lives at the Dolphin Discovery Centre in Bunbury in Western Australia. Alan Simm, who recorded the video, is a volunteer at the centre, and was asked to help document and identify the mother dolphin. In the tragic clip, Cracker can be seen diving for her tiny calf, bringing it to the surface and balancing the calf on her snout before pushing it down again. The mother dolphin, whose name is Cracker, lives at the Dolphin Discovery Centre in Bunbury, Western Australia