Assertion: echinoderm | /r/CapableOf | move about the sea floor
Facets:
value: by filling its tube feet
type: MANNER
value: across reefs
type: LOCATION
value: across rocks
type: LOCATION
Source sentences:
text: The echinoderm moves about the sea floor or across rocks or reefs by filling its tube feet with water to extend them and then using muscles within the tube feet to retract them.