Assertion: barnacle | /r/SimilarTo | limpet
Facets:
value: in appearance
type: OTHER
Source sentences:
text: Unlike barnacles (which are not molluscs but may resemble limpets in appearance) or mussels (which are bivalve molluscs that cement themselves to a substrate for their entire adult lives), limpets are capable of locomotion instead of being permanently attached to a single spot.