Hadrien Foucher | Scuba Diving on Instagram: "One of the most surprising things about nurse sharks is how they see. Their eyes are small and placed high on the head. At first, you might think their vision is limited, but nurse sharks actually have very strong night vision. They are most active after sunset, and their eyes are adapted to low light, helping them hunt for fish, crustaceans and octopuses in dark spaces. They also have a special feature called the nictitating membrane. It works like

North Sea Videos on Instagram: "On April 28, 2000, 22-year-old Russian diving instructor Yuri Lipski prepared for a dive into one of the world’s most famous and dangerous underwater locations: the Blue Hole in Dahab, Egypt. An experienced diver, he equipped a camera to document his journey into the deep blue abyss. Tragically, that camera would not capture a triumphant exploration, but instead would become the sole witness to his final, harrowing moments. Lipski’s plan was likely to dive to the

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