....but the foolishness of fools is folly. Proverbs 14:24
"We may finally have figured out which group of animals evolved 
first (New Scientist).
Sponges were the first animals!
No, comb jellies were first!
The debate has gone back and forth for decades now.
New Scientist chooses the comb jellies, or ctenophores.
Problem: that requires the near-instantaneous emergence of a nervous system, gut, and locomotion."
CEH