The Perfect Perch Paradise

Perch Dissection Lab by Gabby Trudo, Mitcham, period 6


To explore the external and internal parts of a perch fish, and to understand their functions.

Background Information

The yellow perch's scientific name is Perca Flavescens. The yellow perch are found all over North America in freshwater ponds, streams, lakes, or rivers. The majority of the perch live in the Great Lakes. Perch fish feed on smaller fish, insect larvae, and shellfish; they have to watch out for northern pike, muskellunge, bass, sunfish, crappie, walleye, lake trout, and even other yellow perch as sometimes the species is cannibalistic. The yellow perch and European perch are different species, but are seen as closely related due to their morphological similarities. Perch fish are prized by both recreational and commercial fishermen since they are common, flavorful, and fun fish to catch. There have been cases-such as in the case in Drummond Island, MI- where there are limits to the amount of perch fish you can catch and kill, in order refrain from obliterating specific bodies of water from this yellow perch species. Overall, the yellow perch is a 'least concern' species, meaning they are populous and not in danger of extinction at all.

Personal Pictures of the Perplexing Perch

The Plump and Perky Perch

The Circulatory System

The perch’s circulatory system keeps blood, nutrients, and water flowing throughout the body. It is a closed system that consists of a heart that is made up of the atrium and ventricle. The atrium receives unoxygenated blood and pumps it into the ventricle. The ventricle is located right under the atrium, and transfers the blood it receives from the atrium into the bulbus arteriossus. The bulbus arteriosus is an organ located near the ventricle that helps maintain a steady blood flow into the gill system through heart contraction.

Fun Facts

The yellow perch makes up approximately 85% of the fish caught in Lake Michigan by recreational fishermen. There are two other types of perch fish, the European perch, and the Balkhash perch, both of which on average grow to a larger size than the yellow perch. The female perch fish are usually larger than the male, and reach sexual maturity between 3-4 years, as opposed to the males at 2-3 years. In many northern lakes, the yellow perch overpopulate due to the sport fishing of other species in the lake, which makes them a great irritation to the recreational fishers in the area. A single female perch can lay between 10,000 and 200,000 eggs in April or early May, once the lake they are in reaches a minimum of 45 degrees Fahrenheit.
Perch anatomy
Perch Dissection


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