The walleye is a perch, related to the yellow perch and the sauger.
A perch.
it is called a roost
Limb?
A fish called the climbing perch can climb trees.
Red Fin
Racing loft.
It is called peritoneum.
A fish that is called a yellow perch.
A perch for a mountain goat is a ledge.
The plural of perch, when referring to a bird's perch, is perches. The plural of perch, when referring to the fish, remains perch.
The true perch is perca flavescens, and is indigenous to the Great Lakes watershed, most of the northern tier of states and up to central Canada. They are most commonly called "Perch", "Yellow Perch" and "Lake Perch". That said, "perch" is one of the most misused terms in the restaurant industry, being used to describe half a dozen different fresh and salt water fishes, some of them not remotely like Yellow perch in flavor or quality.