This image was shot for the cover of KAS Magazine. The person you see is a tomato grower from Holland, earlier that year the company was hit by a heavy hail storm which destroyed the whole greenhouse. For a behind the scenes video please follow: http://www.tuinbouwtv.nl/film/video/jos-van-mil-kopje-onder-voor-kas/
I used the Canon Mark III with a watercase, 50mm lens (because of the size that would fit in the case) and a underwater flash. After a short test session a day earlier, the grower came in wearing a full suit. My colleague threw candy tomatoes in the water while we took a dive.