While Dickinsonia was definitely an animal, its exact classification is still debated. Some scientists believe it was a very early type of animal that predates the "Cambrian Explosion" – the period of rapid diversification of animal life that began about 541 million years ago. Others suggest it may have been a type of fungus or a very simple, pre-animal life form.
It's important to note that while Dickinsonia is the oldest animal fossil, there are older fossils of life in general. These include fossilized traces of microbes from over 3.5 billion years ago. However, these early life forms are not considered animals.