While perusing Flicker I found this great picture. The photographer says:
"This is the photo I've been waiting for! 2 of the sea monkeys from my 2nd batch were mating for days with no results. This female from my 3rd batch had been swimming around for several days with a male attached.
Tonight they were separated at last, and when I looked closer, I saw a dark lump on her abdomen.
I took dozens of photos (using Super Macro) then cropped them to get a good view."
See more photos here: http://www.flickr.com/photos/bycp/5751005308/