It's natural but scientists say it's pretty rare and that this one likely rotates the way it does because the current of the passing water pushes that way.

这是自然现象，但是科学家们说这种现象非常罕见，而且这颗行星可能会以这种方式旋转，因为流过的水流会以这种方式推动它。

The gills are com-like structures on either side of its head. The fish breathes by swallowing water and passing the water over the gills. The gills absorb the oxygen from the water.

鱼鳃在鱼头两边的其中一边。鱼通过鱼鳃吞水和吸水来呼吸。鱼鳃从水里吸入氧气。