Assertion: seahorse | /r/CapableOf | steer with small pectoral fins
Facets:
value: on their heads
type: LOCATION
Source sentences:
text: The scientists found that when this gene was deactivated in zebrafish, the zebrafish also lost their pelvic fins, which could explain why seahorses propel themselves with a small fin on their backs and steer with small pectoral fins on their heads.