What characteristic often fades or disappears entirely on larger, older Opaleye specimens?

Answer

Yellowish-white spots below the dorsal fin

Younger fish often display prominent yellowish-white spots below the dorsal fin, but these markings tend to fade or vanish as the fish grows into an older, larger adult.

What characteristic often fades or disappears entirely on larger, older Opaleye specimens?
sizefishopal eye