Was the earliest predator fierce?

No,half a billion years ago the shrimp was the first predator and he could eat nothing harder than baby foodThe scientists got a 3-D model of its mouth and they inspected it."the mouth parts appear soft andbendable in (fossil) specimens," said paleontologist James "Whitey" Hagadorn of the Denver Museum of Nature & Science. "That struck me as kind of funny."
To also prove that, he looked at the fossilized feces of the shrimp and found non containing bones just soft stuff.
They also said that if it did eat bones it would hurt its self really badly.They also found out that there were some other animals close around that had bones in there feces."The damage to those Cambrian trilobites is real, and if it was notAnomalocaris's doing, who then was the predator? If Hagadorn is right andAnomalocaris could only gum its prey, then the search is on for the actual durophagous (that is, shell-cracking) Cambrian predator."
Discovery.com