Amano changes

Why do these two look so different right now? Why's just this one amano yellowish with a very thick white line when usually he looks just like the others?

Another photo of the others.



Another of him.

There different since there two different species of shrimp. The two in the first image are bamboo shrimp which is a filter feeding shrimp while the other two are amano shrimp

Yes, the yellow shrimp is a bamboo shrimp.