I hate to sound like a crabby git, but this is pretty shellfish. Seriously though, only in China could this happen.
And by China standards, this is pretty tame. Fish restaurants in southern china & HK are pretty creepy.
Girl who works at the local PetCo went to China Town in San Francisco to buy a turtle they were selling as food. 20 years later it has made a very nice pet. And damn 200 crabs a day? Could make a killing on that.
aw i envy you, i wish to go to seoul. a little off topic, but i heard they sell panties in vendings in japan i think it was. edit: this is a pretty good read: http://inventorspot.com/articles/japan_used_panty_vending_machines_5650