One of my octopuses died today, and when I disected him, I noticed that his hearts were in unusual condition. They were very enlarged and glossy black in color. I was wondering what may have caused his hearts to take on this state. I am thinking parasites...to see if this is the case I saved the hearts and am going to disect them tomorrow. Has anyone else ever experienced this? If so, what causes an octopus to aquire this problem?