Assertion: seaweed's holdfast | /r/CapableOf | anchor sponge
Facets:
value: to the substrate
type: TRANSITIVE-OBJECT
Source sentences:
text: A holdfast is a root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate.