“What do you call a Chinese crab?”/“A crust-asian.”

The word “crustacean” has been the subject of a pun:
 
Q: What do you call a Chinese crab?
A: A crust-asian.
 
“What do u call a chinese crab? A crustasian” was posted on Twitter on December 29, 2010. There have been many similar puns.
 
   
Wikipedia: Crustacean
Crustaceans (Crustacea /krʌˈsteɪʃə/) form a very large group of arthropods which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill, woodlice and barnacles. The crustacean group is usually treated as a subphylum, and thanks to recent molecular studies it is now well accepted that the crustacean group is paraphyletic, and comprises all animals in the Pancrustacea clade other than hexapods. In other words, some crustaceans are more closely related to insects and other hexapods than they are to certain other crustaceans.
         
Reddit
What do you call a scab-ridden japanese fisherman? (self.funny)
submitted April 25, 2010 by halogen1212
A crust-asian.
Commence fish puns.
 
Twitter 
che$ha
‏@chel_renee
Hey @victoriakenzie. What do u call a chinese crab? A crustasian.
3:35 PM - 29 Dec 2010
 
Twitter
Ian Collins
‏@ian_STR
what do you call a crab from china?
a crust-asian!!
1:42 AM - 15 Mar 2011
 
Twitter
Mike Towers
‏@MikeTowers
What do u call an Asian crab? A crust-Asian!
11:39 AM - 24 May 2011
 
Twitter
ally a
‏@allyallyally_
what do you call an Chinese crab? A CRUSTASIAN
3:53 PM - 1 Oct 2011
 
Twitter
Frank Rooney
‏@HairyFrank
@RealBobMortimer Oriental Seafood Pie: is the crust Asian?
2:36 PM - 2 May 2013
 
Twitter
Abe Yospe
‏@Cheeseboy22
A crab from Japan should be called a “Crust-Asian.”
8:19 AM - 30 Jul 2013
 
Twitter
jeffdsilva
‏@jeffdsilva
what do you call a Chinese Lobster?
a Crust-Asian!
9:43 AM - 10 Nov 2014
 
Twitter
Abe Yospe
‏@Cheeseboy22
A crab from Japan should be called a “Crust-Asian.”
4:35 PM - 27 Jul 2015
 
Reddit
What do you call an Asian lobster?
submitted October 9, 2016 by Altered_DNA
A crustasian