Smells Perchy!

Perch Dissection Lab: By Ajay Singh - Guzman - PAP Bio - 4th


Perch is the common name for fish of the genus Perca. The complete taxonomy of the perch is: Kingdom Animalia, Phylum Chordata, Class Actinopyerygii, Order Perciformes, Family Percidae, and Genus Perca. Some adaptions the perch have include a lateral line system, which is sensitive to vibrations in the water, as well as sharp dorsal and anal fins for protection against predators. Opercula also act as a protection mechanism for the perch and can be found over the gills of the perch.


Students will be learning about the external and internal anatomy of a perch. Students will focus on the organs, structures and functions of the digestive system. Students will also understand the ecological role of the perch.

Impact of Perch on Humans

The perch has a huge impact worldwide; having once been one of the most common fish in the world, many species of the perch are now going extinct due to the rising demand of fish from consumers (for eating). The extinction of such a large composition of the fish population could cause environmental problems in the future. For example, the most abundant species of perch is the Nile Perch. Because the perch multiply very quickly by laying a large quantity of eggs, they can take up too much space in the water. Since the Nile Perch is a common dish in this part of Africa, however, this minimizes the environmental impact the perch could have on the Nile ecosystem.

Ecology of the Perch

Taxonomy and Evolution of the Perch

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The perch belongs to the class Actinopterygii, meaning it is classified under the group of fish that are "ray-finned." This class of fish possess the latest evolutionary adaptions in terms of the classes of fish in general, as shown above in the diagram.

Circulatory System of the Perch

Circulatory System of the Perch
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The perch has a closed circulatory system, meaning that blood is only pumped through the blood vessels of the organism. The heart consists of one atrium and one ventricle. Oxygen-poor blood is pumped through the heart and to the lungs. After the blood is oxygenated, it goes directly to the tissues. It then travels back to the heart. The circulatory system is integral to many of the systems of the perch. One such example is the muscular system: the circulatory system provides oxygen to the mitochondria in the muscles, which gives the muscles energy to operate.
Bony Fish (Perch) Anatomy

Fun Facts!

  • Perch breed toward the beginning of the summer and the end of spring, and lay their eggs along vegetation in gelatinous strands.
  • As they grow, perch develop a humped back.

This Project is By:

Ajay Singh

Guzman - PAP Bio - 4th