They didn't want all those little local "baitfish" competing with young trout for food.

Look at number eight right above that: What human beings resemble is an intelligent fisherman, who having cast his net into the sea, pulled up the net out of the sea full of little fish.

Xiaoyu Zaijia - or Little Fish - responds to voice commands using a combination of pictures, text and speech. Unlike many rival AIs it is dependant on a touchscreen.