Assertion: angel shark | /r/HasProperty | usual
Facets:
Source sentences:
text: These are usual having flattened bodies and board pectoral fins that give them a strong resemblance to rays.
text: This angel shark is unusual in that it is known to swim off the bottom at night and, in its northernmost range, to migrate northward in summer.
text: The angel shark is an unusual looking fish which is often mistaken for some kind of skate or ray when it is in fact a true shark species.