Cnidarians are the sister taxa to all those animals.” These results suggest that V-set domains evolved earlier than expected, says Nicotra, “back in the last common ancestor of Cnidarians and all the ...

The animal kingdom contains a vast array of animals capability of remarkable regenerative abilities, but known are quite as adept at this healing task than sea-swelling Cnidarians, such as hydra ...

In the evolution of metazoans, sponges diverged first, followed by cnidarians (jellyfish and corals). Nearly all other metazoans are bilaterians — so named because they have bilateral symmetry.