The giant cuttlefish fades and dies after mating. Somehow they maintain a little dignity in dying.
Read this article "New Finding Revealed that Mosasaur Gave Birth to Young Ones" at http://www.naturearchive.tk/2015/04/new-finding-revealed-that-mosasaur-…
I love that cuttlefish show some level of intelligent behavior, although, the giant cuttlefish is a little scary looking. I like the small ones best.