Crawling fish

Chris: It's constantly crawling.
Me: What is?
C: Waters. Waters.
M: Water?
C: Wilbur.
M: The fish? (We have a fish named Wilbur.)
C: Yeah.
M: How's he crawling?
C: He's going from start to finish.
M: Is he in a race?
C: No.
M: What's the start?
C: I don't know.
M: How is he crawling?
C: I don't know. Why don't you ask him?
M: What would he say?
C: Merp!