Complex sentence: The alligator gar, "Atractosteus spatula", is a ray-finned euryhaline fish related to bowfin in the superorder Holostei (ho'-las-te-i).
Split into simpler sentences: The alligator gar, "Atractosteus spatula", is a euryhaline fish. They are related to bowfin in the superorder Holostei (ho'-las-te-i).