Assertion: echinoderm's larva | /r/CapableOf | metamorphose among holothurian
Facets:
Source sentences:
text: Among holothurians, echinoids, and ophiuroids, the larvae may metamorphose as they float, and the young then sink to the seafloor; among crinoids and asteroids, however, the larvae firmly attach to the seafloor prior to metamorphosis.