Answer:
Who is it that rows quickly with four oars but never comes out under his own roof?
What scientists might call your pooch.
What jumps when it walks and sits when it stands?
They swim around in schools or pods and they are related to whales
Disgusting creatures that would survive a nuclear strike.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?