They're just trying to decide somehting.

她们两个在决定事情。

So they can manipulate those to have different textures and they use that also as camoflauge so they can look like a rock or a piece of algae or somehting.

所以它们可以操纵那些具有不同纹理的东西，他们也可以将它们用作伪装，这样它们就可以看起来像一块岩石、一块藻类或某种东西。