That fish isn't a perch, it's actually called the Bluegill Sunfish

For the Love of Bluegill

A Case for Selective Panfish Harvest - In-Fisherman

Panfish on steroids — Hybrid bluegill top choice for small ponds - Texas Hunting & Fishing

Pint-sized sunfish provide fast action and great table fare, The Highlander

Bluegill Fish Facts Lepomis macrochirus - A-Z Animals

Sunfish Hatch Magazine - Fly Fishing, etc.

Bluegill Mountains to Marsh

Bluegill Mountains to Marsh

Interesting Facts About Bluegill Sunfish - Henneke Fish Hatchery

Sunfish Care - Keeping Pumpkinseeds, Bluegills and Their Relatives

Bluegill Sunfish A Comprehensive Species Guide - Wired2Fish

Mackenthun: From scales to markings, sometimes it's tricky to get fish ID, Local Sports

Sunfish Care - Keeping Pumpkinseeds, Bluegills and Their Relatives

Understanding bass forage: Sunfish - Bassmaster

Illinois State Fish: The Pound-for-Pound Champ