“Have you seen the new fishing website?”/“No, it’s not online yet.”

A fishing website pun is:
   
Q: Have you seen the new fishing website?
A: No, it’s not online yet.

 
The “online”/“on line” joke has been cited in print since at least 2001.
   
“Can you buy clothes pegs online?” and “Can you tell me when the next train is coming?”/“Look online” and “What do you call a teller on a tightrope?”/“Online banking” are other “online” jokes.
 
       
Scatty—Internet Jokes (March 9, 2001)
Have you seen the new fishing website?
No, it’s not online yet.
 
Google Books
Super Goofy Jokes
By Jacqueline Horsfall
New York, NY: Sterling Publishing Company, Inc.
2004
Pg. 79:
Have you seen the fishing website?
It isn’t online yet.
 
Yahoo! Answers (April 13, 2008)
Its kids time folks are these funny?
(...)
Have you seen the new fishing website?
No, it’s not online yet
     
XciteFun.net
STUPEFIED - Have you ever seen?
Post by suchitra » Nov 21, 2008
(...)
Have you seen the new fishing website?
No its not online yet.
 
Google Books
The Computer Zone:
Jokes, Riddles, Tongue Twisters and Daffynitions

By Gary Chmielewski  
Chicago, IL Norwood House Press
2009
Pg. 14:
Have you seen the new fishing website?
No, I heard it’s not online yet!
 
Twitter
shaneka_babler2
@shaneka_babler2
Have you seen the new fishing website? No, it’s not online yet.
5:21 AM - 8 Apr 2010
 
Twitter
Jamie Goodwin
@GoFloridaFishin
Fishing Joke of the Day:  Have you seen the new fishing website? No, it’s not online yet. Hahaha ~ No worries-we are! http://bit.ly/aduJGD
5:21 PM - 18 Apr 2010
       
Google Books
The Mammoth Book of Really Silly Jokes:
Humour for the whole family

Edited by Geoff Tibballs
London, UK: Constable & Robinson Ltd
2011
Pg. ?:
Have you seen the new fishing website?
No, it’s not online yet.
 
Narooma News (Australia)
13 August 2014, Narooma (New South Wales) News, “Fishing report for Far South Coast NSW: Aug. 13” by Stan Gorton, pg. ?:
Joke of the week: Have you seen the new fishing website? No, it’s not online yet.
 
Twitter
Андрей Томашевич
@kova1ena313
Have you seen the new fishing website? No, it’s not online yet.
2:32 PM - 22 Dec 2016