I will have To agree with you. In my experience with jardini arowanas I have come across mostly aggressive specimens that in the end have to be kept alone. I have delt with about 12 Jardinis in my fish keeping ventures and I have only seen 2 that co-exist with other fish. The rest were very aggressive towards tankmates and have killed dozens of fish. The that were ok with tankmates were raised with fish slightly larger then them when they were about 4" and both fish were raised to about 30"(these fish were kept on seperate occasions. I tried keeping the others with tankmates of all sorts and fish and had no luck, all they did was beat the crap out of their tankmates. So from my experience I'd have to say that jardinis are great fish but they aren't for everyone. If you going to attempt to keep this fish be aware that they can be very aggressive towards tankmates. My suggestion would be to keep them in a large tank with tankmates slightly larger than them. Thanks Steve_89 for starting this thread I think that the info your giving is very accurate and I aggree with your thoughts.