Mammals - Pet Handedness - Episode 211



Classroom Investigation
Does your classroom have a pet goldfish? You can do a simple investigation with your own class pet! Here's how. Watch your fish closely, and count the number of times you see its gills beat in one minute (you might watch its mouth open and close instead). Now, encourage the goldfish to "exercise" by gently swirling a clean straw or stick in the water. You don't have to scare the fish, just get it to swim around for a whole minute. Leave the fish alone again, and count the gill beats now. What did you notice? If the gill beats increased, then how many minutes have to go by before they slow down to the resting rate?