Assertion: moray eel's fin | /r/CapableOf | extend along their back
Facets:
value: from behind their head
type: LOCATION
Source sentences:
text: Their dorsal fin extends from just behind their head, along their back and joins seamlessly with their caudal and anal fins.
text: Green moray eels have a dorsal fin that begins just behind their gills and extends all the way down their backs.