So my fish tank at the office was once filled with goldfishes. I either totally underestimated how difficult goldfishes were to keep or I just wasn't meant to keep goldfishes. One day all of them would be happy and swimming around and then the next morning I would find most of them upside down.
So after a year or so of trying to keep goldfishes, I decided to trade in the only one I had left (trooper) for a silver arowana. I always wanted a red/gold arowana and although they are illegal, I'm sure you could find them if you looked hard enough. But they're also super expensive running into the thousands of dollars for a single one. yikes! So since I never kept arowanas before, I decided to give one a try and went with the legal silver ones.
It's about i'd say 4-5 inches long right now and they can supposely get HUGE. Like 46+ inches. That's a big fish. Heck, it's in a 48" long tank so that means once it's full grown, it would be almost as long as my tank? amazing! but ofcourse that'll never happen as i'll have to upgrade (oh no!) to a bigger tank. haha. It's a matter of necessity. i HAVE to upgrade. haha. where to put the big tank? I'll figure that out later. haha.