Ok, I'm willing to admit that I saw the sperm too when I first looked at it. It also looks like that houseplant with the little balls for leaves think they call it 'string of pearls' and I think it's a hoya. I've been looking for one for years without any luck, so they must not grow them anymore, at least around here.
It's the coolest algae bloom I've ever seen! Glad you shared it with us, not sure I would have been willing to admit to creating that mess.