On a reef in the Pacific Ocean, 17,000 camouflage groupers dart about in the cloudy water. It is, in fact, an underwater orgy— turned feeding frenzy. An orgy might seem like a rather flamboyant way to breed, but sex in the sea is a surprisingly inventive affair. So what other sneaky escapades are happening under the sea? Luka Seamus Wright offers a peek beneath the ocean’s covers. Lesson by Luka Seamus Wright, directed by Michelle O'Connell and Lisa Vertudaches. Music and sound by Phil Brookes