Assertion: eagle ray's fin | /r/HasProperty | dark
Facets:
value: usually
type: DEGREE
value: uniformly
type: DEGREE
Source sentences:
text: The dorsal fin is either uniformly dark or has a blotch on the front edge.
text: It has a diamond-shaped pectoral disc that is much wider than long, with trailing pointed fins, usually a dark coppery to blackish on top and white underneath.