Cnidarian vs Holdfast - What's the difference?
cnidarian | holdfast |
any of various invertebrate animals, such as jellyfish, hydras, sea anemones, corals and formerly sponges and ctenophores that belong to the phylum Cnidaria .
Something to or by which an object can be securely fastened.
(zoology) A root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate.
(archaic, medicine) Actinomycosis.