Assertion: echinoderm's symmetry | /r/HasProperty | pentamerous radial
Facets:
Source sentences:
text: When mature, echinoderms have a pentamerous radial symmetry.
text: Echinoids come in a variety of different shapes, sizes, and color, but like all echinoderms, they have pentamerous radial symmetry (with the exception of irregular echinoids that have bilateral symmetry) and spiny skin.