Snerk
Smeghead
They mainly dwell i shallow water and are far less complex than any worm.
Not really, rocks with living goo on them. Stromatolites themselves are rocklike structures composed of dead stuff. They are the earliest known fossil evidence of life, but that's not the same as what you originally said.It can't be anything else than stromatolites. And they are far more than just rocks.
Don't worry about eating, you'll die of thirst first.YOU'RE HUNGRY AND YOU'RE IN THE SAHARA DESERT, BUT THERE'S NO PLANTS OR ANIMALS OR NOTHIN' AND YOU'RE TOO FAR FROM ANYTHIN'. WHAT DO YOU EAT?
your sandwich in your pocket?
Sand??????
You eat the sandwich you've been carrying along for no real reason but is now useful.