Crafty cuttlefish change colour to outwit mating rivals
17 October 2016 Last updated at 05:36 BST
Some male cuttlefish use a clever trick to evade bigger rivals when competing for a mate – they change colour to look female.
Marine expert Sheree Marris witnessed this crafty cross-dressing while filming thousands of cuttlefish converging in the shallows off Australia”s southern coast.
Video: Sheree Marris