I've had a tire track eel for about 2 months now, but I never see him. I have checked the filter multiple times as my other species of fish in my tank have gotten in there within that time as well but he is never there. I have also extensively searched every nook and cranny around the floor and room the tank is in and haven't found him. Is it a viable assumption to think he is just burrowed in the tank bottom and being reclusive? I have one small hide in the tank I have checked several times as well and moved around that he isn't in either...