Nicaragua
Nicaragua functions like its Lake Nicaragua sharks—oceanic species trapped in freshwater: 700,000 emigrants since 2018 flow through the same land bridge that enabled the Great American Biotic Interchange.
Nicaragua's geography is a biological paradox made economic: a volcanic isthmus where oceanic sharks swim in freshwater lakes, and where 700,000 people have emigrated since 2018 through the same corridor that enabled the Great American Biotic Interchange 3 million years ago. The country sits on the Central American land bridge—less than 1% of Earth's surface containing 7% of global biodiversity—with 19 active volcanoes creating the fertile soils that make Nicaraguan Arabica coffee prized worldwide. Lake Nicaragua, Central America's largest at 8,264 square kilometers, contains tarpon, swordfish, and bull sharks that adapted to freshwater after volcanic activity sealed their ocean bay.
This geography of flow and blockage defines modern Nicaragua. The Río San Juan offers the lowest sea-level crossing between Atlantic and Pacific—just 19 kilometers from Lake Nicaragua to the ocean—inspiring repeated canal proposals. China's $50 billion concession in 2013 never materialized, but the country found another export: migrants. The Ortega government sells 96-hour transit visas at arrival, processing over 1,000 charter flights from Haiti and Cuba in 2024 alone. U.S. officials accuse the regime of 'weaponizing migration,' profiting from human flow while expelling dissidents.
The economic metabolism reveals the dysfunction. Coffee generates 500,000 seasonal jobs and 7% of exports, but labor shortages caused by mass emigration now threaten harvests. The US imposed 18% tariffs in August 2025 on a country where 52% of exports go to America. Nicaragua recorded 3.6% growth in 2024 but faces slowdown as its two survival strategies—coffee monoculture and migration remittances—both depend on access to the same market now imposing sanctions. Like the sharks trapped in Lake Nicaragua, the economy adapted to conditions that are changing faster than adaptation allows.