I bought fresh farm-raised tilapia for my snakes the other day...since it has been recommended as having the least amount of mercury and sodium, etc. Unfortunately, my snakes do not seem to like it as much as they like their salmon. They just love salmon. I really want them to eat the tilapia because I feel better feeding that to them. Don't know what to do. I guess I will see if I can find some trout...I believe that was lower in mercury than salmon, right? I'm going to keep trying the tilapia though...