“rneerkat: rneerkat: what kind of fish is made of only two sodium atoms 2 Na http://tmblr.co/ZkYVPwq-YCQs” was posted on Twitter by Roarar’s Ready for Jul! (and others) on July 30, 2013. “2 Na” is “tuna.” The joke originated with this tumblr post, and has been printed on several images.
   
“What do you call a fish with two sodium atoms? Answer: 2Na” was posted on Reddit—Dadjokes on August 24, 2015. “What kind of fish is made out of two sodium atoms? 2 Na” was posted on Reddit—Dadjokes on December 10, 2015.
   
“what kind of fish is made only of 2 sodium atoms? 2Na” was posted on Twitter by Beth on August 6, 2013. “What fish is made out of 2 sodium atoms? 2 Na” was posted on Reddit—Dadjokes on January 16, 2019. “What do you call a fish made of 2 sodium atoms? A 2Na” was posted on Reddit—Dadjokes on October 14, 2019.
   
       
Twitter
Roarar’s Ready for Jul!
@MiindohilRoarar
rneerkat: rneerkat: what kind of fish is made of only two sodium atoms 2 Na http://tmblr.co/ZkYVPwq-YCQs
3:57 PM · Jul 30, 2013·Tumblr
   
Twitter
abbie
@akingofbees
Chemistry jokes are the best, for example: What type of fish is made from only two sodium atoms? ...2 Na
4:47 PM · Jul 30, 2013·Twitter Web Client
   
Twitter
matt
@nunchykrut
rneerkat: rneerkat: what kind of fish is made of only two sodium atoms 2 Na http://tmblr.co/ZLLuSvq-t090
5:04 PM · Jul 30, 2013·Tumblr
   
,a href=“https://twitter.com/a1m0st3v1l/status/362397276104179715”>Twitter
User
@a1m0st3v1l
eleven-at-trenzalore: rneerkat: rneerkat: what kind of fish is made of only two sodium atoms 2 Na I actually… http://tmblr.co/Zim6Cxr1Ozz9
10:20 PM · Jul 30, 2013·Tumblr
   
Twitter
Lumi Kare
@lumi420
Hey guys, do u know the fish that is made of 2 sodium atoms?
1:18 AM · Aug 6, 2013·Twitter for Android
   
Twitter
Beth / #WearAMask
@Bzth
what kind of fish is made only of 2 sodium atoms?
2Na
5:20 PM · Aug 6, 2013·Twitter Web Client
   
Twitter
nakedparrot
@jonnyschooley
What kind of fish is made of only 2 sodium atoms…. 2 Na
8:22 PM · Aug 12, 2013·Twitter for iPhone
 
Reddit—Dadjokes
Posted by u/5exyrioteer August 24, 2015
What do you call a fish with two sodium atoms?
Answer: 2Na
 
Reddit—Dadjokes
Posted by u/Phila7x December 10, 2015
What kind of fish is made out of two sodium atoms?
2 Na
       
Reddit—Dadjokes
Posted by u/rewtyman June 12, 2016
What kind of fish is made of only two sodium atoms?
2 Na
 
Reddit—Dadjokes
Posted by u/madazzahatter May 12, 2017
What kind of fish is made from just two sodium atoms?
2 Na
   
Reddit—Dadjokes
Posted by u/mc_88 September 13, 2017
What do you call a fish made of two sodium atoms?
2Na 🤷🏼‍♂️
   
Reddit—Dadjokes
Posted by u/JanPachimari January 16, 2019
What fish is made out of 2 sodium atoms?
2 Na
   
Reddit—Dadjokes
Posted by u/toolaroola12 October 14, 2019
What do you call a fish made of 2 sodium atoms?
A 2Na
 
Reddit—Dadjokes
Posted by u/1963Jan December 5, 2020
What kind of fish is made from two sodium atoms?
2Na
   
Reddit—Dadjokes
Posted by u/DrRetr0_76 December 16, 2021
What fish is made out of two sodium atoms?
2 Na
 
Twitter
mariana Z
@mariana057
What kind of fish is made of only two sodium atoms?
2 Na…
9:31 PM · Dec 16, 2021·Twitter for iPhone