I think they're stripping, but I don't mind, because there's an 'opening' in there where you see the blue ocean, I love the story in this superb photo, I am so envious :)
i wish i could bring to mind the name of the contemporary artist who paints images of people in boxes - this reminds me of that - such a charming sense of scale here with those people in that tiny space. the image would be beautiful without them but with them it's quite special.