Assertion: barnacle's shell | /r/HasProperty | hard
Facets:
Source sentences:
text: —one a typical “acorn” barnacle entirely encased in a hard shell and the other a “gooseneck” barnacle with an elongated, fleshy stalk.
text: Barnacle has hard outer shell which resembles the shell of mollusks.
text: A shell is a hard outer layer, which has evolved in a very wide variety of different animals, including molluscs, sea urchins, crustaceans, turtles and tortoises, and armadillos.
text: It may also surprise you to see barnacles included on this list: adult barnacles develop hard shells that stick them to their surroundings, such as the bottoms of boats or other underwater surfaces.
text: Barnacles also grow a hard outer shell in addition to the exoskeleton.