Nicknamed "Kodak Gap" by some, it is one of the top tourist destinations in Antarctica; steep cliffs hem in the iceberg-filled passage, which is 11 km long and just 1,600 meters wide at its narrowest point.
They have distinctive and complex teeth. Each tooth has tubercles, or bony protuberances with spaces between them. The upper and lower jaws fit together so that when the mouth closes the teeth and the tubercles can strain krill.
Older animals become progressively paler, even when freshly moulted, and may appear almost white. In younger animals, there are net-like, chocolate-brown markings and flecks on the shoulders, sides and flanks, shading into the predominantly dark hind and fore flippers and head.