Israeli activist Benjamin Kahn promotes the conservation of these geographical features around the Red Sea. A city named after these features is called the "Brazilian Venice," and is the capital of Pernambuco. One of these features includes the "Great Blue Hole," and is the top tourist destination in Belize. The loss of zooxanthellae in these formations, causing a rise in temperature, leads to their "bleaching." Another of these features is threatened by the Crown-of-Tho
Israeli activist Benjamin Kahn promotes the conservation of these geographical features around the Red Sea. A city named after these features is called the "Brazilian Venice," and is the capital of Pernambuco. One of these features includes the "Great Blue Hole," and is the top tourist destination in Belize. The loss of zooxanthellae in these formations, causing a rise in temperature, leads to their "bleaching." Another of these features is threatened by the Crown-of-Thorns starfish and is located to the east of Mackay, a city in Queensland. For 10 points, name these living geographical features found on coasts, the largest of which is the "Great Barrier" one.
Israeli activist Benjamin Kahn promotes the conservation of these geographical features around the Red Sea.
coral reefs [or barrier reefs] 