man, y'all are prejudiced against invertebrates! There's no drop-down menu choice for phyla that have, like, 19 genders. I'm so put out (^_o)

Here, have a worm's eye view of another of their kind, sometime in the long Ediacaran twilight before the Cambrian explosion of body forms and lifestyles. Before worms, everybody was an itty bitty cell or group of cells...but then came tissues, organs, assemblages of organs, and ultimately the biggest organisms Earth had ever seen--worms.