Loggerhead Key Key is named after the loggerhead sea turtle, an endangered marine reptile and species of sea turtle with a cosmopolitan distribution throughout the world. The Little Africa coral reef is located at Loggerhead Key. The reef is home to various species of tropical fish, spiny lobster and several juvenile game fish. Coral types include "various species of stony and gorgonian coral". The flora of Loggerhead Key includes mangrove, coconut trees, geiger trees, morning glory, sea lavender and cactus. In the 1840s, the island was covered with white buttonwood trees, which were burned or cut down by island inhabitants. Bay cedar
Loggerhead Key done to provide the monkeys a place to breed, to supply the animals for medical research laboratory experiments. Around 1,322 of the monkeys existed on the island between 1987–1990. The Dry Tortugas Light is a lighthouse located on Loggerhead Key. It began operations in 1858 and was decommissioned in 2014. The Carnegie Marine Biological Laboratory, also referred to as the Tortugas Laboratory, was a marine biology laboratory and research facility constructed on the northern end of Loggerhead Key that operated from 1904 to 1939. It was constructed and operated by the Carnegie Institution of Washington. The Carnegie Marine Biological Laboratory