for an interactive fish you could try a red devil/midas a jag or even a myan cichlid. the myan being the slowest grower of the group. If you have a smaller tank 55 gal or better a myan will give you more time to get a bigger tank.
What size tank do you have for this jag? What is he in now? A male jaguar can easily reach 16, and its not uncommon to see bigger. I would say something around 100g for one adult male? Be carefuly of their agression as well. Mine is only 3 1/2in, but thinks he is 12. He has killed several tankmates already in a terrifying fashion. (Bites the heads off of five giant danios, but doesn't eat them)- It was like a warning- dont #$%@ with me! Hence his name is lucifer. But anyway thats my rambling, hope everything goes well with yours, keep us posted![]()