With the Kobe dai.. for each male.. there are 10 females that gather around.. trying to get him to mate with her.. but the male can spend as much as half a day, testing to see which female is worthy of passing her genes to the next generation of Kobe dai.. after the male picks a mate.. they will "dance" for about 30mins as he pets her with his pectoral fins.. and swim upwards in a spiral.. as they both release their sperm & eggs respectively at the same time! More strange? When there are no males in a population.. the female Kobe dai actually turn into male Kobe dai.. their body changes, the color changes, and they start to produce sperm.. That is how male Kobe dai come to be.. That blew my mind away..