Wachusett Reef was a phantom reef in the Antarctic Ocean. Captain Lambert of the ship Wachusett reported that on June 4, 1899 he passed over a reef which appeared to be of coral formation in approximately latitude -32.3°N, -151.13333°W. The reef appeared to be about 500 ft wide. The bottom showed of a dark gray color with deep blue on both sides of the reef. The depth was estimated at from 5 to 6 fathom; unfortunately no soundings were taken. The 2015 edition of the National Geographic Atlas of the World still shows Wachusett Reef, with a depth of 9 m. Nevertheless, its existence is doubtful, making it a phantom reef. Other nearby historically reported reefs which appear to not exist include Ernest Legouve Reef, Jupiter Reef, and Maria Theresa Reef.