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According to local folklore, Captiva got its name because the pirate captain José Gaspar (Gasparilla) held his female prisoners on the island for ransom (or worse). However, the supposed existence of José Gaspar is sourced from an advertising brochure of an early 20th-century developer, and may be a fabrication.
Around 3000 B.C., the sands of Captiva started to erode, resulting in the eventual formation of Sanibel Island. The Gulf of Mexico waters were eight feet lower than they are today. It is said that the first inhabitants of Captiva were the Calusa Indians. The population of the Calusa is believed to have reached as many as 50,000 people. "Calusa" means "fierce people", and they were described as a war-like people. The Calusa Indians were resistant to colonization and attacked any explorers who came into their territory. Calusa Indians built their houses on stilts without walls. They wove palmetto leaves together to build roves (twisted strands of fibers). The Calusa Indians fished for food on the coast, bays, rivers, and waterways. They did not farm. “The men and boys of the tribe made nets from palm tree webbing to catch mullet, pinfish, pigfish, and catfish. They used spears to catch eels and turtles. They made fish bone arrowheads to hunt for animals such as deer. The women and children learned to catch shellfish like conchs, crabs, clams, lobsters, and oysters.” The Calusa Indians used the shells on the island for utensils, jewelry, tools, weapons, and ornaments.
By the late 1700s most of the Calusa Indians had died out. Many were captured and sold as slaves while others died from diseases such as smallpox and measles.
An Austrian named Binder (b. 1850) was on a German freighter headed to New Orleans when the ship crashed and he was shipwrecked off Boca Grande. He then washed up to shore on what has been since 1921, Upper Captiva. “He lived for several weeks on what the unoccupied island had to offer, built a makeshift raft, and got himself to Pine Island, where he was helped to return to his home. By 1888, due to his having fought with the U.S. Army, he became naturalized, and was allowed to homestead on Captiva in 1888, when he was 38 years old. For 10 years he was Captiva’s first and only inhabitant. He died in 1932.” 
Originally part of neighboring Sanibel Island to the southeast, it was severed in 1926 when a hurricane's storm surge created a new channel, Blind Pass. The channel filled in over subsequent years, but was reopened by dredging in the summer of 2009. Like Sanibel, Captiva is a barrier island to Pine Island (to the east of Captiva and north of Sanibel), however it is much narrower. The only automobile access to Captiva is via the Sanibel Causeway and Sanibel-Captiva Road, which ends in the CDP of Captiva, the island's only CDP. Captiva was homesteaded in 1888 and a tiny cemetery next to The Chapel by the Sea has the grave of the original resident, William Herbert Binder (1850–1932), an Austrian. Half the island is in private ownership, with "Millionaire's Row", luxury homes on gulf and bay side of Captiva Drive. The South Seas Island Resort entry gate is at the end of this road. Roosevelt Channel on the east side of the island, is named for Theodore Roosevelt who fished there.
North Captiva Island or Upper Captiva is another island, in turn severed from Captiva in a 1921 hurricane, creating Redfish Pass. North Captiva has power from lines that originate on the north end of Captiva, and is privately owned. With about 300 homes built and 300 vacant lots, the island is about half way to build-out. Since the island can be accessed by boat or small plane only, North Captiva real estate values are generally lower than on Captiva.
Captiva was seriously damaged in August 2004 when the eastern eyewall of Hurricane Charley struck North Captiva, immediately before hitting Charlotte Harbor to the north-northeast. Initial reports indicated that 160 buildings were destroyed and another 160 seriously damaged. Reports indicate that the storm surge cut a path 491 yards (449 m) wide across the narrowest part of North Captiva, separating the island. The separation of the two halves of the island began three years earlier during a series of tornadoes caused by Tropical Storm Gabrielle that passed through the area in September 2001. The new pass filled in within a few years and is now back to its pre-Charley state. Most of the invasive Australian pines on the island blew over in the hurricane, making room for native mangroves and sabal palms.
The Bubble Room was built on Captiva Island in 1979 by the Farqhuarson family. It is a multi-themed restaurant featuring old toys from the 1930s and 1940s and the collection continues to grow each day. The Bubble Room plays music from the 1920s, 1930s, and 1940s. The Bubble Room was one of the first establishments on Captiva Island to originate the bright pastel colors now widely used there.
South Seas Island Resort and Yacht Harbor, a 330-acre (1.3 km2) resort, occupies the northern two miles (3 km) of Captiva Island.
Captiva was the full-time home of artist Robert Rauschenberg. His home still stands there.
Roy Lichtenstein , American pop artist, also had a home on Captiva.
In the 1997 movie G.I. Jane, Captiva Island is the location for the S.E.R.E. (Survival, Evasion, Resistance, Escape) training for the fictional U.S. Navy Combined Reconnaissance Team.
- "The Calusa: "The Shell Indians"". University of South Florida. Retrieved 9 October 2012.
- Captiva Civic Association (1984). Voices From the Past...True Tales of Old Captiva. Sutherland Pub. pp. 2, 7. ISBN 0930942051.
- "The Bubble Room". Retrieved 9 October 2012.[permanent dead link]
- "Pepperidge Farm". Retrieved 9 October 2012.
- 10 Best Places for Second Homes
|Wikimedia Commons has media related to Captiva Island.|
- Sanibel-Captiva Chamber of Commerce Official website for Sanibel and Captiva Island businesses.