Discover the Red Sea's "Big Five" sea turtles - ancient marine legends like the seagrass-gardening Green Turtle, critically endangered Hawksbill with its hawk-like beak, and rare deep-diving Leatherback giants - that have thrived in this biodiversity hotspot for over 100 million years. These keystone species shape vibrant reefs and nurseries, but face dire threats from overheating sands, rising tides, and habitat loss. This guide reveals how to spot them and why urgent conservation is key to their precarious future.