David Phan on Instagram: "What is this giant cuttlefish doing? I have always wondered what these Australian giant cuttlefish are doing when they flare out their tentacles like this. Are they signalling for females to come to them, or cleaning out their siphons? I usually see them do this immediately after exiting tight caves. This was filmed with my @gopro 13 in Cabbage Tree Bay, Sydney #ocean #wildlife #australia #cuttlefish #giantcuttlefish #gopro"