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The chain is composed of four larger islands and about 50 smaller islands. The two main islands, Nggela Sule and Nggela Pile to its southeast, are separated by a channel, Mboli Passage. The name Florida Island is sometimes also used to refer to Nggela Sule. The other two large islands lie northwest of Nggela Sule; Sandfly (also known as Mobokonimbeti or Olevugha) and, further northwest, Buenavista (also known as Vatilau).
Many of the smaller islands have white coral beaches. North of Nggela Sule is Anuha (70 ha (170 acres)), and just off the southwest coast of Nggela Sule is Tulagi. the capital of Central Province. Other islands include Gavutu and Tanambogo.
The first recorded sighting by Europeans was by the Spanish expedition of Álvaro de Mendaña on 16 April 1568. More precisely the sighting was due to a local voyage done by a small boat, in the accounts the brigantine Santiago, commanded by Maestre de campo Pedro Ortega Valencia and having Hernán Gallego as pilot. They were who charted it as "Pascua Florida" (from the festival of that name) from where its present-day name "Florida" derives. Tulagi in Nggela Sule was the seat of the administration of the British Solomon Islands prior to the 1942 Japanese invasion in World War II.
The Nggela Islands group lies immediately north of the more famous island of Guadalcanal, the scene of the Guadalcanal Campaign during World War II; however, Nggela Sule itself was garrisoned by the Japanese in April 1942 in connection with their efforts to establish a seaplane base on neighbouring Gavutu. On 7 August of the same year, the United States 1st Battalion, 2nd Marine Regiment landed on the island to provide cover for the assault on the neighbouring Tulagi islet. Florida Island served as a small, secondary base of operations for the US and Australian and New Zealand war effort in the Pacific for the duration of the war. Following the Allied liberation of the island from the Japanese, it became the site of a US seaplane base. About 80 Japanese troops from Tulagi escaped to Florida Island and fought Marine and British Solomon Islands Protectorate Defence Force patrols for the next two months until being wiped out. The island subsequently served as a watering point for the US Navy, diverting water from an underground source on the island.
After World War II, the British administration moved to Honiara, Guadalcanal.
Other animals include:
- dark sheath-tailed bat
- diadem leaf-nosed bat
- dwarf flying fox
- Geoffroy's rousette
- great bent-winged bat
- island tube-nosed fruit bat
- long-tongued nectar bat
- Solomon's naked-backed fruit bat
- Woodford's fruit bat
- Larson, Thomas J. (2003). "The Geography of Guadalcanal, Savo, Florida And Telugu". Hell's Kitchen Tulagi 1942–1943. iUniverse. p. 25. ISBN 9780595277568.
- "A Guide to the United States' History of Recognition, Diplomatic, and Consular Relations, by Country, since 1776: The Solomon Islands". history.state.gov. Office of The Historian, US Department of State. Retrieved 27 July 2017.
- Macdonald, Ian (3 December 2010). "Provincial Flags (Solomon Islands)". CRWFlags.com. Retrieved 27 July 2017.
- "Geographic Names: Sandfly Passage: Solomon Islands". geographic.org. Bethesda, Maryland: National Geospatial-Intelligence Agency. Retrieved 27 July 2017.
- Macdonald, Ian (16 March 2013). "Central Province (Solomon Islands)". CRWFlags.com. Retrieved 27 July 2017.
- Sharp, Andrew (1960). The Discovery of the Pacific Islands. Oxford: Clarendon Press. p. 45.
- Brand, Donald D. (1967). "Geographical Exploration by the Spaniards". In Friis, Herman Ralph (ed.). The Pacific Basin: A History of its Geographical Explorations. New York: The American Geographical Society. p. 133.