Assertion: flatfish | /r/HasProperty | unique
Facets:
value: among fishes in their asymmetry
type: OTHER
value: as a group
type: MANNER
Source sentences:
text: As a group, flatfishes are unique among fishes in their asymmetry, and they are noteworthy in that only they, among vertebrates, deviate so radically from a bilaterally symmetrical body plan.