Sea creature - Descendent of Ran

Thought to be descendants of the Norse sea goddess of death Rán, who collects the drowned in a net. These sea creatures prey on men of the sea with their alluring appearance, who are pulled from their boats into the sea unknowingly by the tightly gripping tentacles before being paralysed and constricted by the barbs on their tail ready to be devoured. This was created for Zbrush Facebook competition, where the criteria was to create a unique creature who is capable of killing humans. My idea was to create something which was both deadly was curiously beautiful, a trait which the creature uses to it's advantage.