Solitary Islands Marine Park sweetlip ("Plectorhinchus gibbosus") occur with mulloway ("Argyrosomus japonicus"), snapper, red morwong ("Cheilodactylus fuscus"), silver trevally ("Pseudocaranx georgianus"), bream ("Acanthopagrus" spp.) and tarwhine ("Rhabdosargus sarba"). Marine turtles are common in the Park, with green turtle ("Chelonia mydas"), loggerhead turtle ("Caretta caretta"), hawksbill turtle ("Eretmochelys imbricata") and occasional sightings of leatherback turtles. Nesting green turtles and loggerhead turtles have been recorded on several beaches, with some eggs hatching successfully. Only a few species of sea snakes have been recorded in the region, including the Elegant sea snake ("Hydrophis elegans") and Yellow-bellied sea snake ("Pelamis platurus"). The only reptile recorded on Muttonbird Island
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