Assertion: winter flounder | /r/Synonym | the black
Facets:
Source sentences:
text: The winter flounder (Pseudopleuronectes americanus), also known as the black back, is a right-eyed ("dextral") flatfish of the family Pleuronectidae.
text: Also known as the black back, the winter flounder is a sizeable flatfish whose small head and mouth are located on the right side of its body.