My catfish anihilate any crayfish, fish, crustaceans, plants, heaters, filters, or fingers that go in their pond. Extremely aggressive. Growing at a rate of about 1" per month now that they are settled. Big one is pushin 26" now. I would like to see the crayfish that could get the best of him? I have a small one that survived because I liked him and wanted to see how big it could get. What is the biggest crayfish any of you have raised? Had mine for 2 months now and he's grown about 1". Is that good? He's about 4" long now.