This rabbit is called "Fish Girl Bunny"
"Fish Girl Bunny" is another popular QQ emoticon after Burski, author: SnL. The Fish Bunny: a bunny with two cute incisors, a round face, and a love of eating radishes and frowning all day long, is a happy bunny.
Baidu "fish girl rabbit emoticons", download everywhere
Baidu encyclopedia has a detailed introduction