The species, which recently spread from its natural territory in the Pacific to Atlantic waters, is aggressive, exotic and very, very hungry. Kent DePinto explores how lionfish went from being an aquarium favourite to the scourge of an aquatic ecosystem as it eats everything in its path – with no natural predators in these seas to control it. She meets the people who have made it their life’s work to eradicate lionfish from Florida waters, in an underwater journey of spears, guns, and survival of the fittest.

Kent explores the tight-knit and sometimes unlikely partnerships of conservationists, scientists, and competitive spear-fishermen and women, as they band together to combat one of the biggest challenges American and Caribbean coral reefs have faced.”