Fish Anatomy and Physiology

What is a defining characteristic of all fish?

• They are warm-blooded

• They have lungs for breathing

• They possess a backbone

• They lay eggs on land

What does it mean for a fish to be cold-blooded?

• Their body temperature is always very low

• They can change their body temperature to match their surroundings

• They only live in cold water environments

• They produce their own body heat

What is the function of the operculum in a fish?

• To help the fish swim faster

• To protect the fish's gills

• To help the fish digest food

• To allow the fish to see underwater

Which fin is primarily used by a fish for forward movement?

• Dorsal fin

• Pectoral fin

• Caudal fin

• Pelvic fin