Cuttlefish are good fun...with their appearance of having hooded eyes and the way their tentacles take on the appearance of a 'beard', giving them the air of wise old men as they hover together in overhangs. They're plentiful around where I learned to dive on Sydney's Northern beaches...saw my first ones on my OW checkout dives. We see them from when they're just clusters of eggs, to tiny adults in miniature, to adults about a foot long...and finally, when the life cycle is over, their bones litter the tideline.
When you approach they often seem so curious, lifting their front tentacles in a gesture that has all the appearance of vulcan peace sign, as they flash through their colours in an attempt to communicate, as much to ask 'do you speak cuttlefish? Are you an intelligent creature?'
Cephalopods - among the kewlest critters in the sea.