In perhaps the most fascinating mating behaviour of any species, smaller males can fade their translucent colouring and switch to the mottled maroons and whites of a female, before tucking their billowy arms up into their bodies. This makes them appear female, and as the burly males are busy fighting it out and leaving their potential partner unguarded, these "little sneakers", as Bramley affectionately called them," dart past them to get access to the female and then rapidly change their colouring back to male. A win for the clever underdog.