Underwater sound effects like this one are a staple of video editing because the muffled, bubbling texture is instantly recognisable even without any visuals. Creators use them to sell a change of location, moving a scene from air to water, or to make swimming, diving and ocean footage feel more immersive. Because the effect relies on tone and muffling rather than words, it works across languages and formats, from short social clips and gaming videos to documentaries, animations and classroom projects about the sea.