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

@decode.video on Instagram: "The post features a video of a professional swimmer at Tenerife Top Training performing a seamless underwater dolphin kick glide after a dive, covering significant distance with minimal surface disturbance in a high-tech flume pool. This technique demands exceptional core strength, ankle flexibility, and anaerobic endurance, as peer-reviewed studies in swimming biomechanics show it generates up to 20% more propulsion efficiency than surface kicking but risks hypoxia