All seriousness if you know you can't provide the adequate space for the Barracuda call your public aquarium and see if they will take it off your hands.
Just depends on the species if it's anything that gets excessively huge I am considering that but right now it's in a 180g tank but I heard great barracudas and other bigger species need way more space so just trying to get as much info on it as possible
if you haven't already, post this in the general salt forum, and maybe cross post on some reef forums as well. there may be someone who can identify the exact species you have.
Doesn't look like a great barracuda to me but I haven't seen one that small. Here's one I caught a couple of months back and they grow a lot bigger than this