Female praying mantids ... Bizarre as is seems, the male mantid can continue to engage in sex after his head has been devoured. Sexual cannibalism isn't a must for the mantis to reproduce.

Female black widows sometimes eat their mates after copulation. Female praying mantises are known for biting off the male's head. Scientists now say male blue-lined octopuses avoid a similar fate ...

Mantis shrimp are truly spectacular predators of the marine world. Like a praying ... longer spears, male zebra mantis shrimp provide virtually all of the food while the female puts her efforts ...