Hello and greetings folks! I've been maintaining a cold fresh water aquarium for quite a while now with fish from my nearby river and I've been planning on adding crayfish to it. Now I already did my homework when it comes to crayfish housing, water conditions, fish they can live with, food and such and went to get some at the river. I did catch 2 specimens but one of them was showing ill signs. Unable to find a decent explanation to the bruises and dull coloring of the crayfish in the web, I came here for help. The crayfish in question: You can see the bottom one has a way duller color compared to the top one, the tail shows irregular white marks and the shell has 2 weird bruises that resemble pimples. I'm wondering if this crayfish has any kind of disease that could infect the water of my aquarium and what kind of sickness it has, if any.