Meaning
This flag stands for the British Indian Ocean Territory, which covers the Chagos Archipelago in the central Indian Ocean. The area is known for clear lagoons and coral reefs.
It is seldom used in everyday chat, appearing mainly in geography quizzes, maps, reef and ocean research and flag collections, with 🐠 or 🗺️. Diego Garcia, one of its atolls, has its own separate flag emoji. “The coral reef footage from the Chagos is stunning 🇮🇴🐠”