Ok so I know I have a decent sized Amphopod population, I definitely hope it gets a lot bigger so I can get a mandarin, I've always seen them scurrying along the sand bed and rocks but I just shined a light in the tank and was looking for a little bit and this Amphopod starts swimming like trying to go against the current and everything and the funny part is that it was swimming upside down, like legs up and body down and I've never seen them swim atleast not in my tank so my question is is this normal? Or could it be something else like not an Amphopod?