Perch Dissection Quiz

What is a function of the operculum?

Answer explanation

The operculum is a bony flap that covers and protects the gills. It opens and closes to help move water from the throat, across the gills and then out of the operculum.

What is a function of the lateral line?

Answer explanation

The lateral line is a specialized sensory structure for detecting pressure changes/movement. Example: vibration of waves from movement of prey.

What feature is used to determine the gender of the perch in this video?

Answer explanation

The presence of either 2 testes=male, presence of 1 ovary=female.

What is the function of the liver?

Answer explanation

The liver is designed to detoxify the blood and produces bile for fat digestion.

What is the function of the swim bladder?

Answer explanation

The swim bladder is almost translucent, smooth and shiny! It's large, adjustable air-filled sac-like structure that changes the density of the bony fish resulting in increased buoyancy. This quality is not found with the sharks.

Distinguishing characteristics of the perch (fish) includes

• Fins

• Has a backbone

• Book lungs

• A and B Only

What do fins do for the fish?

• Propulsion

• directional movement

• stabilization

• All of the above.

What is the function of the caudal fin?

Answer explanation

The caudal fin is responsible for movement forward (propulsion)