Editing Crinoid (section)

====Regeneration====
Crinoids are not capable of clonal reproduction as are some [[starfish]] and [[brittle star]]s, but are capable of regenerating lost body parts. Arms torn off by predators or damaged by adverse environmental conditions can regrow, and even the [[Organ (biology)|visceral mass]] can regenerate over the course of a few weeks.<ref name=Ruppert/> The stalk's uppermost segment and the basal plates have the capacity to regenerate the entire crown. Nutrients and other components from the stalk, especially the upper 5 cm, are used in crown regeneration.<ref name=AmemiyaOli>{{cite journal |last1=Amemiya |first1=Shonan |last2=Oji |first2=Tatsuo |title=Regeneration in sea lilies |journal=Nature |date=June 1992 |volume=357 |issue=6379 |page=546-547 |doi=10.1038/357546a0 |bibcode=1992Natur.357..546A |url=https://doi.org/10.1038/357546a0 |language=en |issn=1476-4687}}</ref>

Crinoids have been able to regenerate parts since Paleozoic times.<ref name=AmemiyaOli />  These regenerative abilities may be vital in surviving attacks by predatory fish.<ref name=Ruppert/>