I actually caught an oarfish while deepsea fishing about two years ago. I reeled it in very slowly for about 6 hrs, from 1,298.5 feet. Once at the surface I put it in a specimen container (a big one). I acclimated it to my display tank (a big one) and to this day, it is thriving on fried chicken, whoppers and the occasional chocolate covered cherry.
I would say that he is about 47' now.
Great fish with a great personality, but I feel as though I will have to upgrade my system soon as he is getting cramps from being curled up in a 10,000 gallon tank.
~Michael