Authentic under water scene of crystalline turquoise tropical ocean water with rippled surface and reflections on seafloor with blue background

seabed seafloor seawater undersea underwater rippled sea ocean beneath seascape refraction water turquoise below shallow calm surface horizontal background tranquil clear blue relaxation crystalline texture reflections transparent nature floor reflection seamless motion movement tropical marine video beauty deep loopable scenic abstract sunlight no people slow holiday natural loop authentic 50fps