Reproduction (clam worm) first discovered
Clam worms usually crawl through the ooze on the ocean bed and don’t do much else. But when they start feeling sexy, they change into swimming worms so different in appearance that for a long time, they were thought to be an entirely different species. In 1860, a Gottingen naturalist recognized that there heteronereids were sexual forms of the ooze-dwelling nereids. The males even dance about- often at new moon and high tide- during which they emit sperm and hormones released from the clouds of sperm stimulate the females to lay eggs.
A typical Friday evening in any major city is about the same.