Assertion: crab | /r/CapableOf | breathe by gill
Facets:
value: as a rule
type: MANNER
Source sentences:
text: As a rule, crabs breathe by gills, which are lodged in a pair of cavities beneath the sides of the carapace, but in the true land crabs the cavities become enlarged and modified so as to act as lungs for breathing air.
text: Crabs breathe through gills.