This guy can make himself look like a rock, and, looking at his environment, can actually slide across the bottom, using the waves and the shadows so he can't be seen.
看，这个家伙把自己弄的像石头一样， 观察着它周围的环境， 然后滑过水底， 利用波纹和阴影来隐藏自己，从而不被发现。