Assertion: mackerel | /r/CapableOf | retract their fins
Facets:
value: into grooves on their bodies
type: TRANSITIVE-OBJECT
Source sentences:
text: Like other scombroids, mackerel such as this Atlantic mackerel are superb swimmers, and can retract their fins into grooves on their bodies for streamlining.
text: Like other scombroids, mackerel such as this Atlantic mackerel are superb swimmers, and can retract their fins into grooves on their bodies for streamlining.