OPALEYE (Girella nigricans) is a common perch species of fish found in shallow waters. Adults can grow to 8 pounds, but average 4-5 pounds. They feed on small mollusks, crustaceans and vegetable matter and are generally found in rocky areas. Their name, opaleye, comes from the cream-colored eye-spots located near the dorsal fin. The climate they live in is Subtropical, distribution ranging from San Francisco Bay to south Baja California.

Here is a website that has some more information: Opaleye.