Large sea turtle swims against the strong ocean current over a rocky coral reef system Underwater close-up view

underwater scuba diver reef ocean animal behaviour 4k resolution first person view fpv unique marine science following spotted pattern swimming sea freediving snorkeling fins tail endangered species fishing turtle glides green sea turtle chelonia mydas reptile flippers shell greet friendly floating travel holiday spot tourism marine reserve national parks first nations australia protected ocean current blue water great barrier reef gbr scuba course open water closeup view