Sort out the animals on the basis of their symmetry (radial or bilateral) coelenterates, ctenophores, annelids, arthropods, and echinoderms.
In radial symmetry, body of an individual can be divided into equal halves by any plans passing through the longitudinal axis.
In bilateral symmetry, body can be divided into two equal halves when the plane passes through the median longitudinal axis.
Radial symmetry: Coelentrates, Ctenophores, Echinoderms
Bilateral symmetry: Annelids, Arthropods.