hardwhat am-i

Who is it that rows quickly with four oars but never comes out from under his own roof?
Common Wrong Answers
“A boat”
A boat does not have a roof that it stays under; it is designed to be on the water.
“A crab”
While a crab has pincers that could resemble oars, it does not row or move quickly in the same way a turtle does, nor does it stay under a roof.
“A person in a kayak”
A person in a kayak rows with oars but does not stay under a roof; they are typically on the water.