Millennium is a series of islets that enclose the lagoon, only 20 feet above sea level. It was named in 1999 (formerly Caroline Atoll or Thornton Island) because it is the easternmost point west of the dateline. The first place to see the new millennium (Encyclopedia Britannica). Notably, among the land animals inhabiting the island, is the coconut crab (Birgus latro), named for its ability to crack open coconuts with its claws. These crabs can grow to be 70 cm in thoracic length, have a leg span of 1 m, weigh a few kilograms (with some estimates over 4 kg), and live for decades. Because of their large size and their fabled taste, the coconut crab has been harvested extensively from the inhabited Line Islands. However, remnant populations of crabs thrive on the uninhabited islands (Millennium, Flint), with population estimates of hundreds of thousands to millions of crabs on the southern islands. Photo credit: Image Science and Analysis Laboratory, NASA-Johnson Space Center (Digital File Number: ISS002-E-6368)