Baby Seal

Other adaptations
Pinniped eyes are well adapted for seeing both above and below the surface. The animal has a clear membrane that covers and protects its eyes underwater. In addition, its nostrils close and blood circulation stops to most of its organs when diving. Testicles and mammary glands are located in slits under the skin to maintain the pinniped’s streamlined shape. They also have whiskers to help navigate, and sensors in their skull to absorb sounds underwater and transmit them to the cochlea.