A) Stolon stage just after emerging from the host oocyte. B) Four specimens of free-living Polypodium with 12 tentacles.

A) Stolon stage just after emerging from the host oocyte. B) Four specimens of free-living Polypodium with 12 tentacles.
Photographer: E. Raikova

 

Source

from Figure 1 http://www.biomedcentral.com/1471-2148/8/139/figure/F1?highres=y from:
Nathaniel M Evans, Alberto Lindner, Ekaterina V Raikova, Allen G Collins and Paulyn Cartwright
Phylogenetic placement of the enigmatic parasite, Polypodium hydriforme, within the Phylum Cnidaria
BMC Evolutionary Biology 2008, 8:139 http://www.biomedcentral.com/1471-2148/8/139. As published on Wikimedia <http://upload.wikimedia.org/wikipedia/commons/2/29/Polypodium_hydriforme.jpg>.