crustaceans, and small fish and worms
need low light and sand bed(to bury in and hide)
will not compete for food against faster fishes, so stocking should be done keeping this in mind
needs a large system of 100 gallons or better and room to bury itself in the sand
the get between 15 and 18 inches in length(can't remmeber exactly how long, but sure it is well over 1 ft)