if i were you....i would catch the worm and sell him for the big bucks$$$$$ take a cloth bag with a tie on the end(like a crown royal bag, but thin and white.
put a big pile of food inside of it, then put it in another bag, so that the open part of that bag, is on the bottom of that bag, keep doing this until the worm will have to travel through1-2 feet of baggage to get the food. (make sure it is a big enticing meal)
than pull on the final string, which you have enlarged and hung outside the tank, put him in a small 10 gallon(or small, but saying its a ten gallon so he looks bigger) and post him for sale.
i've seen big worms catch 50+$ on other forums