■ Around 1 billion BC

Fungal and animal strains diverge. In the animal lineage, sponges and other eumetazoa animals first diverge. Sponge (sponge) inhabits all seas around the world, especially tropical seas.

Eumetazoa lancelet.

Next, in the lineage of eumetazoa, two germ layer animals such as jellyfish, sea anemone, and hydra diverge from tridermellous animals, which are a major group of animals.