Yellow Perch: The Inside Story

Hannah Reeves 4/8/14 Vu-PAP Bio-4


To observe the internal and external anatomy of a perch

Perch Facts

Scientific Name: Perca flavescens

  • Perches live in shoreline areas along lakes and rivers. They prefer clear open waters with a mud or sand bottom.
  • Perches prefer water that is between 60-70 degrees Fahrenheit so they rarely swim deeper than 30 feet.
  • Perch predators include large fish, birds, mergansers, and other fish-eating animals.
  • Perches eat insect larvae, crustaceans, and small fish
  • Perches have large eyes to help them find food.
  • Perches have spines for protection ant to stiffen their fins while swimming.
  • Perches are thin and short to provide agility around rocks.
  • Perches are disk-shaped because it makes them more difficult for their predators to swallow them.
  • Perches are stripped so they can hide in weeds for protection or stealth.
  • Perches have a lightly colored belly to hide from predators underneath.

Impending Doom

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Perch Circulatory System

General: A yellow Perches circulatory system is a low pressure single loop one. There is only one direction of blood flow from the pump-like heart. The gills oxygenate the blood as part of this single loop.

Two Chambered Heart: This organ consists of four parts (the sinus venosus, the atrium, the ventricle, and the bulbus arteriosus). The heart pumps the blood to keep it flowing through the fish. The two chambers are composed of the one atrium and one ventricle.

Arteries: A perch has many different arteries, but they all carry oxygenated blood to different parts of the body.

Veins: There are many veins within a perch as well, and they are all responsible for carrying deoxygenated blood back to the gills passing through the heart on the way.

Capillaries: Capillaries are smaller than arteries and veins. They distribute oxygenated blood and collect deoxygenated blood to/from individual tissues.

Gills: These are essential to the circulatory system because they oxygenate the blood and oxygen is essential to cell respiration, which is essential to ATP production, which is essential to life.

The circulatory system works closely with the respiratory and digestive systems. Respiratory because it provides oxygen while the circulatory distributes it, and digestive because it extracts nutrients while the circulatory distributes them.

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Where Yellow Perch are Found

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Bony Fish (Perch) Anatomy