Grass perch/Jack Perch

[JerryofWNY]

Is there a genetic difference between what a lot of guys refer to as "Grass Perch " and "Jack Perch", or is a Grass Perch just a small Jack?

[hardwater Rick]

never heard of a grass perch  does not come up on a search either.
Jack perch are yellow perch.. I would like to see a picture of a grass perch
if there is one.. just another name most likely  maybe it is a white perch.

[OTIS]

Jack Perch are large yellow perch and Grass Perch are smaller yellow perch.

[JerryofWNY]

A lot of the Old Timers in the WNY area always referred to small yellow perch as Grass perch and the larger Yellow Perch as Jack Perch. My guess is that it is a regional thing and they are one in the same. Just wondering.

[jighead]

Exact same species, Latin name Perca flavescens, all common name Yellow Perch.

[Rangerclay]

I know what Jack perch are but this is the first I have ever heard of Grass Perch.  I learned something new today

Ranger

[bigdave1018]

so are slob female perch called jills?

[Ray4852]

A jack perch is an open water fish they live in very deep water they can reach to a size of 20 inches. A grass perch lives in a shallow weedy environment. They are small and have a greenish color.

[Pasquatch]

A jack perch is an open water fish they live in very deep water they can reach to a size of 20 inches. A grass perch lives in a shallow weedy environment. They are small and have a greenish color.

They're the same damn fish. You can catch jack perch in 5 feet of water, and small (grass) perch, in 55 feet. A grass perch is just a name for small yellow perch, and a relatively rarely used name at that. Jack perch is a name used to describe large yellow perch.

[Retired ECO]

 Several of the posts are right on the money, yellow perch are the same, for years I heard the term "grass perch", they are the 2 year to about five year olds and are generally found in the weeds during the summer. When a perch reaches about 6 to 10 years old and it's weight generally passes a pound then it's common for people to call them "Jack" perch. The term has been used for years on Seneca Lake, Roy Japp (Marina Owner) called them "Elephant" perch. Greart article that Otis describes in In-Fisherman, one of the best perch articles that I have read in years. Perch are one on the most prolific fish species that swim and in smaller waters, without the predator fish they will stunt as do bluegills in ponds.

[Lobes]

so are slob female perch called jills?

I'm pretty sure slob female perch are the ones that just spawn year after year, won't work, and just live off of the minnow support.
              

[Thriller]

I'm pretty sure slob female perch are the ones that just spawn year after year, won't work, and just live off of the minnow support.
              

Only in the great welfare state known as Canada... 

[Chucker]

so are slob female perch called jills?

Jills go with Bills. Everyone knows that 

[Texaco]

Hey Ray , where did you get that info? do you really believe a perch will get 20in? a jack perch is just a term used to describe a big yellow perch!