Not a huge “shark” nut I had a rainbow he was cool but I really am meaning towards catfish. I’m not worried about the knife lol he’s way to big for the Dempsey lol the Dempsey is 5-6 inch and the knife is pushing 10” with a big cave so he should be fine. The anti bichir thing sucks the LFS just had a little Senegal in the store today I was tempted to hide it in with the banjo catfish I just bought for my 75g community/rainbowfish: growout cichlid tank lol