Having a hard time dealing with the thought of lobsters in grocery store tanks

I know this sounds stupid. I work in the meat department of a grocery store and in the seafood section there is a tank of lobsters with their claws bound. They probably don't have enough complex feelings to really understand what's going on, but I feel really bad for them and sometimes when I see them I have to go out back and cry. I have OCD and depression and it's gotten to the point where I obsess over it and I can't stop thinking about it or worrying about it. How the hell do I deal with this this is so stupid

EDIT: I didn't expect this to blow up as much as it did, I thought I'd get glanced over mostly and get maybe 1 or 2 responses. But due to the nature of some of the comments here I feel I need to clarify. I'm aware that the nature of my problem is hypocritical because of my line or work, but that doesn't really change the fact that it's a very real thought that troubles me from time to time.

When I made this post I was in a state of distress. Not in a rational state of mind and very emotional. This happens to me alot lately due to stresses in my life and under lying mental illness. These things make me very upset if I sit and think about them for long periods of time, and that includes the meat that I'm cutting every day. But the sectioned piece of prime rib that I see doesn't stir the same feelings as a live lobster in a small tank because it's easier to ignore. Doesn't necessarily make it right but that's just the way it works with me. I don't agree with how livestock is treated either but like the lobsters there isn't much I can do about it, at least not at the moment.