Complex sentence: The fish's upper surface is brown to reddish brown with many scattered darker spots, lighter streaks, and reticulations, including the center of each pectoral fin, which is marked with an oval spot or blotch.
Split into simpler sentences: The fish's upper surface is brown to reddish brown with many scattered darker spots, lighter streaks, and reticulations. The center of each pectoral fin is marked with an oval spot or blotch.