Jealousy has nothing to do with it, some people on RC actually care about their fish, there not just a trophy to them. I thinbk you will be a little dissappointed with your sharks as they sleep and hide almost all day and come out when the lights are off. They are not as "cool" as most people think. They are very messy and you must hand feed them at every meal as they have a hard time finding food and the other fish will eat their food before the sharks can get it. Also you are very limited with the other fish you can put into the tank with them. I agree with the others that sharks are not for newbies. Why dont you set the tank up with sharks in mind but dont put any in for the first year or two as you learn more about the hobby, then get your shark.