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

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