CFP Fish Biology & Physiology

Question 1

What is the primary function of the lateral line system in fish?

Accepted Answer

Sensing water pressure changes and vibrations

Answer

Detecting light intensity and color

Answer

Regulating buoyancy in the water column

Answer

Filtering particles from water during feeding

Question 2

Which scale types are most commonly found in teleost (bony) fishes?

Accepted Answer

Cycloid and ctenoid scales

Answer

Placoid scales

Answer

Ganoid scales

Answer

Cosmoid scales

Question 3

What is the primary function of the swim bladder in most bony fishes?

Accepted Answer

Regulating buoyancy to maintain depth

Answer

Aiding in food digestion

Answer

Producing sounds for communication

Answer

Filtering metabolic waste products

Question 4

Which physiological process allows marine teleost fish to maintain proper internal ion concentrations while living in saltwater?

Accepted Answer

Osmoregulation

Answer

Thermoregulation

Answer

Photoperiodism

Answer

Chemotaxis

Question 5

What structural feature of fish gills enables highly efficient oxygen extraction through countercurrent exchange?

Accepted Answer

Blood and water flow in opposite directions across lamellae

Answer

Blood and water flow in the same direction across lamellae

Answer

Blood and water flow perpendicular to each other across lamellae

Answer

Water flows bidirectionally across stationary blood channels

Question 6

What term describes fish capable of tolerating a wide range of environmental salinity levels?

Accepted Answer

Euryhaline

Answer

Stenohaline

Answer

Anadromous

Answer

Catadromous

Question 7

Which specialized sensory organs in sharks detect extremely weak electrical fields produced by prey muscle contractions?

Accepted Answer

Ampullae of Lorenzini

Answer

Lateral line neuromasts

Answer

Inner ear otoliths

Answer

Pineal photoreceptors