fish on wet floor signs!!?

[John P]

why on wet floor signs is there always a fish??

 

[Sheila m]

I have never seen a fish on one usually a picture of a foot slipping...I feel like I have missed out now

 

[Tom:)]

cause they come from a wet area

 

[Jal.]

I'm with Sheila on this one, a slippy foot is all I have ever seen.