Columbia subject headings:
Animals--Classification.
Chelonia (Genus)
Cnidaria--United States.
Zoology--United States.
Harvard subject headings:
Animals--Classification.
Chelonia (Genus)
Cnidaria--United States.
Zoology--United States
Princeton subject headings:
Animals--Classification.
Chelonia (Genus)
Ctenophora--United States.
Zoology--United States.