This is Dog, a cat who lives in Hai Phong, Vietnam.
Dog's Vietnamese name is Chó, and he's 3 years old.
Dog's kind of a big deal in Hai Phong, where he spends a lot of time at the local market helping the fish vendors.
A tweet with photos of Dog went viral this week, gaining more than 19,000 retweets.
Let's meet the most famous cat in Vietnam atm. His name is Chó (meaning "Dog" in Vietnamese) and he's a fish vendor. He loves wearing costumes too. https://t.co/r55tE4kiKc