Spiny Devilfish usually, as one can guess from their highly camouflaged appearance, do not move very much.
I came across three of them in quite an excited state on a dive this week. There was one big one, the female, and two smaller ones, the males, and the males were obviously very excited about the female and kept chasing her around.
As she was moving around, escaping the attention of the two males, more male devilfish kept appearing out of nowhere!! First there was a third male joining the group, then a fourth and finally a fifth!!
They would all chase her around, then she would stop, they all pile on top of her then everyone stayed very still…until the female swam off again, and they all repeated their actions..