"The Best Non-Mammalian Freediver In The World" - This beautiful footage was filmed off the Coast of Oahu, Hawai'i courtesy of Freediver, Skydiver and Yoga Practitioner, Heather Prana @heatherprana - honu zen 💙 - 🔵Maestro's Notes: As sea turtles are air breathing reptiles, they need to surface to breathe. Sea turtles can hold their breath for several hours, depending upon the level of activity. A resting or sleeping turtle can remain underwater for 4-7 hours. Green sea turtles tend to have good vision, well adapted to a life at sea. The turtles can see many colors, but are most sensitive to light from violet to yellow or wavelengths of 400 to 600 nanometers. They do not see many colors in the orange to red portion of the light spectrum. On land, however, the sea turtles are nearsighted because the lenses in the eyes are spherical and adjusted to refraction underwater. Sea turtles have no external ear and only one ear bone, called the columella. With one ear bone, the turtles can only hear low frequency sounds, from 200 to 700 Hz. Sounds can also be detected through vibrations of the head, backbone, and shell. The nose of the turtle has two external openings and connects to the roof of the mouth through internal openings. The lower surface of the nasal passage has two sets of sensory cells called the Jacobson’s organ. The turtle can use this organ to smell by pumping water in and out of its nose. - #diveoahu #oahudive #scubadiving #diving #Conservation #Education #Research #OceanOptimism🌊 #OneOceanGlobal🌏 #GreenSeaturtle #OneBreathHold #Oahu #Hawaii #SaveOurSeaturtles Repost from @maestro320
