Not for nothing, but I've got a breeding pair in my 190g. See my sig line for stocking. The female is around 6" and the male is close to 12". The female also bred once with my other big male who was 15". I say "was" because he broke his back hitting the glass protecting the fry from my daughter who came up to the glass a little too fast.
In my tank, the parents don't get crazy protective until the fry become free swimming. Once that happens, they protect about 3 feet of my 5 foot tank. With that said, no one really bothers them either. It's like they understand to keep out. Again, see my sig line for tankmates.
Now, with all of that out of the way, are you prepared for 1,000 fry every four weeks or so? The jaguars are the convicts of guapotes. It just so happens that in my tank, the fry slowly disappear over the course of about a week. They wander away from the nest and get picked off a few at the time until there are none left. This usually takes about a week from when they become free swimming until there are no more.
Whatever you decide to do, good luck. Remember, every fish's personality is deifferent. Just because I don't have problems doesn't mean you won't. I also have a breeding pair of loisellis in this tank. The female loiselli recently also mated with the male friedrichsthalii. Again, good luck.
