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Orange jellyfish swimming

 Phyla

Phyla

By the end of the cambrian explosion, all 35 of the present groups or phyla of animals existed and no new ones have evolved since. Nature had evolved life's essential designs in a single evolutionary leap. Every new shape of life that has followed has been a variation on one of these themes or phyla.

Image of Purple Sponge
Sponges
Image of an Anemone
Cnidarians
Image of a Flatworm
Flatworms
Image of an Annelid
Annelids
Image of Crab
Marine Arthropods
Image of Dragonfly
Terrestrial Arthropods
Image of Squid
Molluscs
Image of Starfish
Echinoderms
Image of Chimpanzee
Chordates