Southern pygmy leatherjackets (brachaluteres jacksonianus) are a type of filefish endemic to Australia. These charismatic, colourful fishes are constantly on the move, swimming around the reef, often chasing each others. I wanted to photograph this species in a way that would convey how dynamic and busy they are, so I used a slow-shutter speed to blur the background, and a snooted strobe to illuminate and "freeze" only the fish and surrounding algae. Photographed in Chowder Bay (Sydney, Australia).