Jelly Fish Embracing

Hello, I would like to share this in case it is new to you as well. I have seen jellyfish on different seas from frighteningly nasty to pacific, but up till now I have not seen them embrace, but they do it. Here they are.
jelly fish embracing 2_2014-07-06 [BL]

jelly fish embracing 1_2014-07-06 [BL]
As an illiterate in the jellyfish department I wonder about the color difference between the two: different races, sexes, or excitements?