My Lobster was given to me and they told me it was old.. I put it in my gold fish pond for the summer and it just thrived.. but i live in New York and winters are harsh so I bring all the gold fish into a pond in the basement for the winter ..when i brought the fish in i noticed i had two additional baby gold fish and the Crayfish was looking pretty good for an "Old Guy" but now that we are in a different setting with no insects added to his diet and natural things falling into the water i would like to keep him healthy and even though he is in with the gold fish try and feed him the extra's that he needs.. I would like some ideas of what to feed him that he would really go for and also would like an idea on how long they live.. thanks