The Dish on the Fish

By: Sydney Moore

Objective: To get familiar with the outside and inside anatomy of a Perch


The perch is a very odd yet interesting animal. It's full scientific name is Perca Flavescens and it is phylum Chordata. Although it is a fish, they are Perch are very poor swimmers that live in fresh water. They can be found in lakes, rivers, or streams, but they are mostly found in the Great Lakes. Specifically, these fish live in the banks of these bodies of water in the vegetation in order to be protected by their predators. Perch lay their eggs in the strands of the rivers or streams and do not raise them. These omnivorous fish eat algae and aquatic insects at early ages then start to eat crayfish, snails, small fish and insects, etc, at later stages. Perches are prey for many animals including larger fish like the Large-mouth Bass, Eagles, Gulls, and Kingfishers. These fish have adapted in many ways including, traveling in large schools to defend against predators, living close to the shore to avoid being prey, and fins and a stream-like body to help them glide through the water.

A behind the scenes look


The Circulatory System

Unlike humans, the circulatory system of a Perch is a single loop system, meaning that blood only flows one direction from the heart. The first step in this process is getting the oxygenated blood oxygenated. The oxygenated blood is pumped from the heart to the gills. In the lungs the blood becomes oxygenated and carbon dioxide is released from the blood. The blood then continues its journey to the rest of the body and back to the heart. This process happens over and over again. The circulatory system is essential to all of the other body systems, because it transports oxygen and nutrients to all of the body.

Distinguishing Features of a Perch

1. 6-8 vertical bands on their back and sides

2. Anal fin has two long and slender spines

3. Dorsal fin divided into spiny portions

4. Golden yellow or brass green sides

5. White or yellow underbelly

Fish Fun Facts

1. The largest recorded Perch was only 3 pounds

2. They are caught very frequently because they like the baited hooks

3. Perch lay their eggs in the spring time

4. Live in water that is 20-25 degrees Celsius

5. Some Perch are cannibals