Any carnivorous creature at that time that lived in the ocean and had a mouth big enough to eat one...they were'nt picky.
The above answer is obviously far too vague and is not quite correct. Instead I offer the following:
Trilobites were early relatives of the arthropods. They had ways of protecting themselves with an exoskeleton and also with spines. Evidently they were not just an available food source for whatever had a large enough mouth and happened to be hungry! Anomalocaris was one of the natural predators of the trilobites and it is also thought to be related to the arthropods. Scientists have found fossilized trilobites that have been attacked and killed by these creatures. The bite marks match perfectly with the mouth of the anomalocaris so it is apparently true.
cause predators ate all of them
They would have been to the small animals they stalked.
tigers have no natural predators
because of the climate they change in land form and predators
Spiders are natural predators of wasps.
they dont have natural predators
Killer whales are regarded as apex predators, lacking natural predators.-From Wikipedia.
Dholes have no natural predators.
None. Bald eagles do not have any natural predators, since they are top predators themselves.
Some of a cheetahs natural predators are leopards,lions and tigers.
No. Unlike the hornets in a children's cartoons, hornets do not have natural predators. But they do have a very few predators, such as the bear or the rackoon.
Birds are dragonflies natural predators.
Orcas have no natural predators.
Bears have no natural predators, they are at the top of their food chain so they are predators. Bears have no natural predators, they are at the top of their food chain so they are predators.
Natural predators of penguins are seals and whales (specifically Killer Whales
The Siberian tiger is the apex predator of their habitat and has no natural predators.
Tigers are top predators. They do not have any natural predators
The Trilobites ended in 1992.
The Trilobites was created in 1984.
The natural predators of the Stingray are warm water sharks such as the Tiger Shark .
The natural predators of a rainbow lizard include large cats and snakes.
Tigers are apex predators. They have no natural predators. Only humans will hunt them.
The Red Kite has no natural predators in the UK.