Under the Antarctic Ice--Sea Star Perknaster aurorae
June 11, 2010
Under the Antarctic Ice--Sea Star Perknaster aurorae The sea star Perknaster aurorae rests on the bottom of McMurdo Sound. The dorsal color of this type of sea star ranges from brick with dark red markings, to beige with brick bands along the arms and on the disc. The ventral color is pale yellow, with dark red interradial bands that reach the oral region. Perknaster aurorae is found in the Antarctic Peninsula, South Shetland Islands, South Georgia Island and Shag Rocks, and probably throughout Antarctica, from 18 to 310 meters depth. P. aurorae has a large convex disc and long arms that are wide at the base. It has been collected at sizes up to fourteen centimeters in radius from its center to the tip of an arm. For more information about sea stars and other benthic life in McMurdo Sound, visit the Web page Underwater Field Guide to Ross Island & McMurdo Sound, Antarctica. (Date of Image: Jan. 11, 2005).
Topics: Environment, McMurdo Sound, Geography of Antarctica, Physics, Geography, Archibald McMurdo, Ross Island, Aurora, Antarctica, Astronomy