Technically she's just a mammal, but any 6 year old little girl that can swim across the Yangtze river in less than 28 minutes, might as well have gills.  
And thats just what Tan Jiajia, a Chongqing first grader did, as she "easily" swam a 1,500 meter stretch of the river in a time of 27 minutes, 24 seconds.  

via: [dailychilli]